Sean,I found a site youmight be interested,if you haven't seen it before.I googled
"spanish civil war mauser information".I scrolled down to "Spain Table".There's a load of info by the author,Dan Reynolds,about the rifles used in the SCW.They show delivery dates and other info.Seems they delivered Mosins as late as 2/13/38.Very interesting but a lot for me to absorb and remember in one sitting.Hope it sheds some light on the weapons used there.
BTW I'm interested in getting a Made in Russia/URRS stamped Mosin.Are they far and few between now and what is the price range for one that's marked as such and more of shooter grade?
Being Spanish myself,I've gotten an interest in the guns and history.
Thanks for any insights.