Air pistol research

The last couple of years I have been researching serial numbers on Haenel pistols (Models 26, Air Pistol, 28, 28R, Super, and variations).   I would be interested in hearing about the serial numbers of any of these pistols you might have along with the caliber and/or any accessories.  The serial number is usually found on the bottom of the grip.  Also interested on the bottom grip markings on the Haenel Model 50 & 51.

I have recently expanded my serial number log to include Tell 3, Pope, Bedford's Eureka, Ranco & Targ-Aire air pistols. Any information you would be willing to provide is greatly appreciated. Thank you for your time. ATVB Bruce Jr.