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Oscar Schmidt OS10021 21 Chord Acoustic AutoHarp - Centurion - Free Gig Bag and Chromatic Tuner

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Autoharp OS100 21 Centurion Summary

This 21-chord Autoharp plays in eleven different keys. The traditional button configuration makes it easy to learn and to continue to play for years to come.

This autoharp is also known as the Centurion. Since there were very few models produced back in the day, the autoharps were assigned names rather than model numbers.


“The Oscar Schmidt OS100 21 Centurion 21 chord autoharp is a great mid-level autoharp that combines the great tones of spruce wood and mahogany.

The body of the OS100 21 Centurion features a solid spruce face and mahogany back. This combination of woods will provide you with a great sounding instrument as well as some cost savings. The OS100 21 Centurion features a glossy finish that brings out the beautiful colors of the mahogany and spruce. The glossy finish will also dampen the sounds slightly as the finish is very thick. The Oscar Schmidt autoharps feature a rock maple frame that goes around the entire instrument. The tuning pegs are held in place by a 10 ply rock maple block. The OS100 21 Centurion features a large sound cavity and will produce a great sound from this autoharp.

Oscar Schmidt autoharps have received a few running updates to make the playing of your autoharp even more enjoyable. The felt on the chord bars is now thicker which will not allow the chord buttons to become flush with the faceplate of the autoharp. Also, some autoharp players were concerned with the clicking noise the chord bars created when they came into contact with the cover. Oscar Schmidt listened and now has placed a felt dampener on the backside of the cover to help remove any noise that the chord bars may make.

Currently, the is running a few promotions. We will ship your autoharp for a flat rate of $20 to anywhere within the continental US. Also, we are including a Free gig bag with every purchase of an Oscar Schmidt autoharp. If you do not want the gig back, you can get $30 off the purchase of a Tuff Skin padded Bag or Grey Ultra Plus Padded bag. We are also including a free digital tuner with every purchase of an autoharp. You can also upgrade to the 3 in 1 chromatic tuner with a built-in metronome and tone generator. has everything you need to play your autoharp. We carry a wide range of books that can help you learn to play your instrument. We also stock all the strings and picks that you will need to play your autoharp. is the premier online retailer of autoharps and autoharp accessories. We have technical support Monday through Friday from 9 am to 7 pm and Saturday from 9 am to 5 pm, eastern time. You can reach us by phone, live chat, or by email. We look forward to hearing from you.”


Oscar Schmidt OS100 21 Autoharp
Original Design
This autoharp features a solid spruce top and the purest overtones of any autoharp Oscar Schmidt offers. The solid spruce top is the industry tradition in all instruments, guitar, clarity, and projection of sound.

Gloss Finish
The gloss finish not only provides an added layer of protection, but it also affects the vibrations, creating a slightly lower sound.


High Quality Material
From the spruce top to the maple back, you can be assured that this autoharp will last. It is built for added strength. The select spruce, which is a laminated sheet of spruce wood, resists splitting and cracking. The lengthwise grains are straight, close and dense which provide excellent support.

Dual Tone Design
The back of the body is made with select maple wood, designed for strength and optimal support. The backside also features a beautiful wood pattern design. 
Oscar Schmidt OS100 21 Autoharp


Oscar Schmidt OS100 21 Autoharp
Incredible Strength
The pin blocks in many of the finest autoharps consist of hard rock maple for extra strength. The pin blocks are laminated 10 ply rock maple pin blocks meaning they are specially coated for extra strength. The purpose of the pin block is to firmly hold the tuning pins in place where the strings are attached.

The added strength of the laminated rock maple ensures that everything will stay in the right place. Multiple layers of maple laminations are cross-banded using a special high frequency, waterproof gluing process. Reversing the grain direction on each layer of lamination yields incredible strength and the high-frequency waterproof glue seals the laminations protecting the pin block from changes in the relative humidity.


Product Specs

Model # OS100 21
Chords 21 Chord
Front Finish Solid Spruce / Gloss Finish
Back Finish Mahogany / Gloss Finish
Additional Features Standard Tuning
Warranty 5 Years

Note: Autoharps no longer have a built-in tuner (see promotions for tuner deals)


Our products are brand new and are still in the original package. They are stored in our temperature controlled warehouse to prevent any damage or warping. Our first-in first-out inventory system assures that you will receive the newest Autoharp available. We specialize in Oscar Schmidt Autoharps and accessories, so our time and energy are devoted to Autoharps. This allows us to provide our customers with the highest quality service and the best products available.

We are an authorized Oscar Schmidt dealer, so you know that we offer the best products on the market. The AutoHarp Store makes it fast and easy for you to find what you are looking for. With our easy ordering system and same day shipping*, it is easy to order and arrives quickly to your door. In order to cut costs to offer our customers the lowest prices, we do everything online. Although most people would prefer to try out a product before they purchase it, by not having a showroom or storefront, we can offer the lowest prices in the market.


Accessories Included

Tuning Wrench and Picks
Tuning Wrench
Assortment of Picks
(Over a $10 value, yours FREE!)



Get Your Bonus Promotions!

  1. Add your favorite autoharp to the shopping cart
  2. Then make your case selection on the next page!

Learn more about each product by clicking on the tuner/case images below. This bonus promotion is for a limited time and only while supplies last!


Bonus Promotion: Purchase an Autoharp by Oscar Schmidt from and you'll have the choice of a FREE Padded Gig Bag or take $30 off your purchase when you add on either Tuff Skin Padded bag or Grey Ultra Plus Padded Bag.

Case Choices:    
hr-custom-green Gig Bag Free More Info

hr-custom-green Tuff Skin Padded Bag Save $30 More Info

hr-custom-green Grey Ultra Plus Padded Bag Save $30 More Info

Added Bonus Promotion:
 Purchase an Autoharp by Oscar Schmidt from and you'll have the choice of either a FREE Tuner (a $23.00 value) or take $20 off the 3-in-1 Chromatic Tuner. Simply add either tuner to your shopping cart to get your instant savings!

Choose Your Tuner & Stand:
free tuner Chromatic Tuner (HT-2005) FREE  More Info

hr-custom-green Tuner + Metronome + Tone Generator 3-in-1 Save $20 More Info

hr-custom-green $13.6 Off Solid Wood Stand Save $13.6 More Info



“An American instrument of American invention.”
The Autoharp is one of the few musical instruments that can claim to be truly American in origin.

Invented in 1881 and patented in 1882, the Autoharp has had a remarkable hundred-year history. After being proclaimed “the nation’s favorite musical instrument” and then nearly fading into obscurity, the Autoharp has taken its manufactures on an endless roller coaster of ups and downs. As a nineteenth-century parlor room favorite, it was finally replaced in popularity by the phonograph. The Autoharp did not die. It retreated to the mountains where it underwent a metamorphosis from a parlor instrument to a folk instrument. From there it came out into our schools to become a classroom feature and finally has emerged as a popular instrument for the serious musician.


QB ID: OS10021


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