1. If he just wants to pop off a few rounds "on ceremonial occasions" .32 Short Colt is available and will work safely if not powerfully.
http://www.buffaloarms.com/browse.cfm/4,5827.html
2. A Colt revolver (Is it?) chambered in .32 Long Colt would predate WW I by several years, never mind WW II. About 1908 Colt gave up on the .32 (and .38) Colt cartridges and started making guns marked .32 New Police or .32 Police Positive; which are the same as .32 S&W Long.
Please post pictures and exact markings.
His old ammunition might not be correct.