On the body of the unit: 40471, 25, 91. On the longer primary arm: 30470 LH. On the shorter secondary arm: L30841, 20810.
Tom from SWISCO responded:
October 11, 2022
Thanks for reaching out to us. Your operator appears to be a match for our 39-031. Please review its dimensions to verify. We also sell the 39-510 bracket, if you also needed that, though you can very likely just reuse the original.