. So now everything about mine now suggests its early 50's but with a matching receiver cover that is dated 1954r. Maybe it was refurbished in '54 and they re-stamped it with the new date?
The date on the cover is original. The serial number on the back of the cover is not. It was fairly common during refurb for mis-dated and mis-matched covers to end up on different rifles. The serials were scrubbed and restamped BUT the dates and arsenal stamps remained. This practice has led to much confusion regarding dates on the soviet SKS45's. So much so that the best way to determine the truth or fiction of the dates on the covers is to examine the rifle design features to narrow down the possible dates of manufacture.