Here you've got another two photos of the R-14's mock-up. One shows its feeding mechanism, in the paternoster feeder there were 10 rounds, another 4 in the 'feed table' and 1 in the loading tray, which elevated with the barrel. In the other photo there are operators (from left to right): fuse-setter, layer and trainer.
Data of the gun:
Calibre: 130 mm
Barrel Length: 9125 mm (L70)
AA Ceiling: 16000 m
Range: 15000 m
Gun Weight: 27600 kg
Muzzle Velocity: 970 mps
Rate of Fire: 15 rpm
Weight of Complete Round : 75 kg (the gun was to use fixed ammunition)
Elevation: -3 / +88 deg
Data and photos here come from an article on the gun in the ATM magazine issue 10/2006. The photo in the initial post by RipSteakface comes from the book "Od bodaku po tryskace" by Martin Dubanek. In the book there are few other photos and drawing of the gun, I'll try to scan them from my copy and I'll post them later on.
BR
Piotr