The owner, David Kean , acquired an RCA theremin recently and the studio is having it restored. According to reports, the Smithsonian Museum has an RCA theremin which has never been on display. Any more information would be greatly appreciated. Mr. Newton's family is the original owner of this AR-1264 still in playable condition. The theremin is currently being refinished and tuned.
Pictures are available at the above link.
Mr. Newton's father used the theremin in the Cornish School of Music in Seattle around the 1930's. For a photo-essay of the restoration process, click on the above link. The Pavek Museum Janet Moe, of the Pavek Museum, and her husband recently restored an RCA AR-1264 to full working condition. The instrument was originally owned by an RCA engineer, and included a document from the engineer to a patent office detailing a modification to change the tone of the theremin. The S.M.M. has a model AR-1264, nearly identical to No. 200138 which has no serial number.