This was covered before on the old Joustersite a long time ago. You will find blobs of yellow paint on No.4(T) rifles and crates. Normally it is on the crate, and may or may not be the rifle here, but one of the reasons was they were marked with yellow paint was to prevent switching between dealers. The yellow marked specimens were for ACME Surplus in Toronto Canada
. I think someone we all know peeled about 5 or 6 Long branch sniper sets out of the piles once they hit this side of the water. At $99.99 they were expensive, as this was 1960's. There was a lot of surplus on the market in those days including some of the Brens found at Canadian Arsenals. Brens in both .303 and 8mm along with some FN C-1A1 and Sterlings were sold in those days from Cdn Arsenals. I'm trying to find one of the old sales receipts from Canadian Arsenals.