Well, as promised (far too long ago), some details of the C-series Long Barrel M59. Again, after reviewing the photos, an interesting mix of parts; note that the receiver cover and bolt were from another rifle, with the bolt (as seen on other Long Barrelled rifles) used on this one and possibly another rifle.
I've got to go through some other stuff, but in looking at images that are available for the Long Barrelled rifles, I note the hand-applied number on the magazine bodies, which would possibly indicate a number of these things that could exceed the estimate of 100. After reading a couple of articles by Bogdanovic on Oruzje Online in which he references a practice of Zastava in producing prototype series for new models of firearms, I wonder if the number of these may be similar. I don't remember which was which from his articles, but when discussing the Yugoslav pistols M57 and M70, I think I recall correctly that one had a prototype batch of approximately 100 pieces, and the other (M57?) had a prototype batch ("0" series, if I recall) of approximately 1000 pieces. If Zastava's practices were consistent, do these rifles represent that prototype batch (ignoring the obvious production series receiver on this one...or not?)? Another piece of potential evidence that may indicate a number of Long Barrels in excess of 100 is that these have the timing/degree marks as seen on other, regular production rifles. Would a hundred or so barrels be worth the time to stamp the degree number on them, or would it be faster to electropencil the number on them? Just conjecture, until we get the final word.
Anyway, enjoy the photos, and I apologize to all for not posting more. Gotta hit the road soon; perhaps more later!