Does anyone know whether Mauser made any ‘deluxe’ versions of its rimfire rifles, such as the 410b?

I visited George Caswell the other day and was looking over some of the treasures in his wonderfully cluttered shop - a Purdey .369 on one shelf, Holland doubles on another, and bolt action rifles from the 20’s - Hoffmans, Mausers, Griffins…. a delectable Graham & Sons 12 bore SxS.

I was talking about Mauser .22s and George produced a 410b that he said he’s been keeping for years and has never listed for sale. It looked like a standard 410b except that the wood was exceptional and the stock shape slightly more streamlined through the wrist and pistol grip. It had a pistol grip cap and what looked like an original Mauser buttplate. The piece looked brand new. I told him it looked like a high grade restock but he insisted it was a Mauser stock.

Could it be an original Mauser 410b with special order features?