Foxy.. we have it sorted out.... we both agree on the number as the greener Elephant mark is next to the serial #, & elephant is the right way up with the 50986.
But I do have a nice 1926,or is it 1929 (small lower case "e" for year code, I 've lost my list) Belgian SLE that came to me from the seller as # 686, but on further inspection, my receiving FFL caught it, the # was most likely 989, as the top hoop on the 8 was smaller than the bottom hoop, making it 989
The devil is in the fine print foxy...hope you are well,
cheers
franc