This Remington manufactured early variation blue finished operating handle without the notch in the rear but having the detent recess and shallow handle grooves is for the earlier model 11-48 semi-auto shotgun and is in very good condition with light wear. (file photos)

Note: Remington model 11-48 semi-auto shotguns with the following gauge and serial numbers have been observed with this part:

12 Gauge: 5071108, 5075577 & 5102735

16 Gauge: 5522646, 5529558, 5550951 & 5578878

20 Gauge: