Adler 268 FA-4S single needle post bed sewing machine with driven roller foot & thread cutter 

The arrival and servicing of a Adler 268 FA-4S sewing machine
Official Adler specs:
For stitching medium heavy to heavy closed and open uppers of standard, sport, work & skiing boots; for closing toe caps and counters, back straps, Derby vamps, sets, eyelet straps as well as coarse stitch ornamental seams
Single needle high performance post bed sewing machine with driven roller foot ( AR ) & thread cutter ( FA ). Heavy duty version.
Feeding: drop , needle feed, roller feed.
Lockstitch. Large horizontal rotary hook ( new ), sliding take up lever, heavy roller foot ( 33 X 5.4 mm ) running in ball bearings, wick lubrication
Max stitch length 6 mm, max foot lift 7 mm
Needle system: 134 LR Needle size: 140 - 180 Threads: 40, 20, 10
Pneumatic foot lift ( FLP 12-1 ) for clutch motor, automatic backtacking device ( RAP 12 - 2 )
Quick Rotan motor and control box. 3 - phase motor. Works with air.