'Boy's Gem' target pistol with Gem-type barrel catch

'Boy's Gem' target pistol with Gem-type barrel catch 

See also:

https://forum.vintageairgunsgallery.com/hercules/information-on-origins-of-hercules-speedy-boys-gem-pistol/

With thanks to Richard L for these pics.

With thanks to Dave for this scan of a 1908 advertisement:

With thanks to Eberhard for the heads up on this pistol, sold for 2.010 euros in September 2016: