Delivered with a new A5 standard 12 gauge, circa 1952:









I would expect that the oil Stan might use in an A5, in a dove field at 100 degrees, might be different than what I might use in a frozen cattail slew at -15. Circa 1952, there were fewer choices. If a guy were to use 30 weight oil, it is a far superior product, today, than what was available then.
The gun these instructions came with has a drop or two of either Rem Oil, or Breakfree CLP on it. The last few times it has been out was in conditions with extreme cold using rather high impulse pheasant loads of 1 1/4 oz. The gun worked just fine.

Best,
Ted