First year K-Model gear cover . . . No "A" after the -52 casting number.
The generator idler shaft boss is a bit different on these. It has a floating (spring load) bushing that rides on the generator gear oil slinger - to let air pressure out - and keep the oil in . . . usually.
You know it's an early cover from 20 feet away by the grease zerk boss on the shifter shaft (it's on the bottom, at 6 o'clock) Only the first few years of gear covers are like this. I'll blast the covers and get the kicker boss built back up - all restored. This kicker cover is actually a later version.