Lynx,
Very beautiful gun. I have a similar Holland however the Crests are different.

I think the above Crest indicates the gun was once owned by one of the Ministers of Hyderabad. If you have any additional info, I would be very interested.

I also am studing the history of Rajasthan and inparticular the Rajputs of Bikaner. Would you know of anyone having knowledge of the family during the the years from 1922 to 1932?