No difference in the guns as far as I know. The difference is in the quantities made. I have three pre-24s and a couple pre-26s, none were easy to find or inexpensive. I would love to have a 24 and/or a 26 but don't think I've ever seen either for sale. There were, I believe, very very few of either built. Same goes for the -1 and -2 versions. Now 24-3, different story, 5000 or more of those if memory serves.

Jeff
SWCA #1457