I couldn't agree more, Mike, about the auction house's description. I'm wondering if 1920 is when the piece was added to the collection. I will be reaching out to Dickson for their records. Thanks.

The auction house' site gave this as background to where this collection came from.

Welcome to our JM Davis Firearms Sale

The JM Davis Firearms Museum in Claremore Oklahoma is the largest firearms museum in the world! In celebration of fifty years of existence, we’ve been asked by the JM Davis Foundation to auction the antique guns and firearms that were a part of JM Davis’ private collection, occupying a store room for over fifty years. Proceeds from the sale directly benefit the long term curation and maintenance of the collection.

Working with the Museum staff, Foundation, and Commission that governs the Museum, we mutually decided to hold the auction at the Museum itself. This is an important decision because it will potentially bring hundreds of enthusiasts and collectors to Claremore to see the museum and have a chance at buying one of JM Davis’ personal collectibles.

The goods in the sale have been under lock and key for 50-59 years. The Museum holds approximately 14,000 antique guns and firearms, representing virtually every aspect of this part of world history. These items represent an entire genre of inventions, from hunting to target shooting competitions to weaponry, virtually from the earliest inventions such as cross bows to early flint-lock guns and rifles.

We welcome all of you to come visit the Museum and chat with fellow collectors and enthusiasts. It is a once in a lifetime opportunity.

The JM Davis Museum is a wonderful historical representation of antique weaponry. The 40,000 square feet of displays show off the wide variety of firearms and their incremental development through time. There are also displays of some of the most famous weapons owned by criminals and lawmen, and also the macabre…

And also:
Introduction to the J.M. Davis Private Collection Firearm and Artifact Auction

J.M. Davis ran the Mason Hotel in Claremore, Oklahoma, for his entire career, from 1917 onward. From the age of seven in 1901 until 1965, he was an inveterate collector of all firearms, as well as artifacts reflecting history in Oklahoma and the Mississippi Valley region. To preserve his collection in perpetuity, he created the 40,000-square-foot J.M. Davis Arms & Historical Museum in Claremore, which is today managed by the State of Oklahoma. It is the largest firearms Museum in North America.

The museum is a must-see for any weapons collector, displaying an incredible amount and variety of weaponry and famous felon, outlaw, and law enforcement personality items from history.

Proceeds of this sale directly benefit the long-term care and maintenance of the Collection. None of the items in this sale are out of the current museum exhibit displays. Nearly all of the items have been stored away, out of public view, since at least 1965 (54 years!), long before the modern era when most of the well-written and researched reference and table-top books on antique firearms were published. As an example, none of these weapons were known to R. Larry Wilson, a prolific firearms writer and author of approximately 60 books on antique firearms, who as a young man and budding firearms scholar, worked for Colt about the time this part of the collection went into storage.

The sale hosts more than 2200, antique to modern (probably none more recent than 1965) firearms, swords, crossbows and knives. In addition, there is a large section of Americana, featuring Native American stone and pottery items, primarily from Oklahoma and the Mississippi Valley. Items of cultural significance that are not in the sale are designated for, or already transferred to, the Oklahoma State Museum.

Davis was also a button, badge, medal and pinback collector, and there are more than a thousand items in this category, mostly in like-kind groups.

The two-day preview prior to the sale is a must for any serious collector.