I am happy to see that it did indeed fit because I only had some rough measurements to work out from.
I had imagined that the small compartment could have been used for a "quick loader" (or what the name is), but I don't know if my friend has got one of those, so for now he has stored some more ammunition in there.
I am kind of tempted to make another presentation case, because it was an interesting project. But I might try to order some baize next time to use for the lining instead of hobby felt.
Smith & Wesson 629 in presentation case.