Greetings Gents,
I'm with Vic on this one. My understanding is that the P.38 holsters were used for the CZ 38 pistols and not for actual P.38s.
Further, I agree with Brent that the only mention of P.38s used by Finnish forces were post war and were actually P1 pistols (allow framed). Even so, the one referrenced in the book has an allow frame, but is marked P.38. These are not uncommon, in fact, I got on when I ordered a P1 from the places currently importing them. Just lucked out I suppose.
A few years back I did hear a rumor from a fellow Finn collector in Illinois that there were, indeed, P1s with the Castle marking in Canada and to keep an eye out for them trickling over the border. However, I haven't ever run across one.
In fact, the only think I have with the castle/tower mark is a Valmet magazine.
Tom Jr