If you have plenty of time, a good place to start would be at Diggory Hadoke's website and book. The website is at

http://www.vintageguns.co.uk/

Diggory is off to Africa next week on safari, so any emails won't be answered for a while. However, his book would be very useful; I have a copy and found it interesting and informative.

http://www.amazon.com/Vintage-Guns-Colle...4169&sr=8-1