In response to the inquiry about the stock origin, Theoben stocks were supplied by Custom Stocks in the UK. They were the main supplier for all Brit rifles until the brands were sold (Webley, Daystate, BSA etc.) to European and Asian mega- manufacturers.
Nice find. Except for AA, those hand crafted, beautiful walnut and blued steel English airguns are a thing of the past. Plastic-Fantastic now rules.