What makes a gun a "howdah pistol" rather than an "Officer's pistol" or "Traveler's pistol"?
I thought howdah pistols generally had features such as belt clips or a ring on the grip cap which make sense when in a howdah.
Is there a reason these are not referred to as "Howdah pistols"?

http://www.jamesdjulia.com/auctions/catalog_detail_shots.asp?Details=48713&sale=135

http://www.arbourantiques.co.uk/2010/firearms/joseph-lang-officers-pistols-sold/