RK and DOD,
I think the model number is actually 242. I hadn't heard of it before either, though I knew about the 296, which is a similarly hammerless .44 special (five shots, like the fabled 696).
In these titanium models alone, the "hump" completely encloses the hammer. They resemble the Bodyguard style, but they are functionally DAO Centennials.
RK, is the moonclip feature original with your gun, or is that the result of after-sale smithing?
Edited to add: Headknocker, you got there a minute before me. Thanks for the additional observations about this interesting L-frame. I think I may want one.
David W.