My double does not have the history or romance of many but to help with your poll I thought I would add mine to the list:

Gunmaker: Krieghoff
Appox manuacture date: 2003
Calibre: .470 Nitro Express
New or pre-owned: Brand New
Condition when bought: Excellent / Brand New
Did you have it checked over: Not necessary
Any problems subsequently: N/A
Ammo regulated: From Krieghoff is it regulated with Federal 500 grain Woodleigh / Weldcore soft points and the targets they sent with the rifle indicates that it regulates to under 1" at 50 yards. I am still waiting for some of the factory ammo to find out if I can shoot as well as the regulator at Krieghoff
Other: N/A
Commercial interests: No commercial interest except being a Professional Hunter

All the best,
Alaskan PH