Nice looking little pistol. I collect pocket pistols.
Neat old pistol, Bonephish. It reminds me of a Spanish Astra 200 in .25 ACP (6.35x16mmSR) I had a long time ago. It has long been since traded off, but it was an interesting example of those little vest pocket pistols of yesteryear.
The TPH is my favorite pocket pistol in .22lr. What caliber is yours .22 or.25. Check Gun Broker for threaded barrels. Barrel replacement is suggested as a project for a gunsmith who is familiar with Walthers from what I have read on the Walther forum. A silencer might be fun but it would not help with concealment.
How much is a model 20 worth? And is it a solid investment. I found one but I haven't been able to find any information on them.