the bracket has the following written on it. p.x. Ind 34 Patented W Handover MA
Is this the one you pictured as the 32-299 for 3/4" shelf bracket
Tom from SWISCO responded:
April 20, 2018
I really can't say. That stamp you gave me doesn't help us identify it. Your best bet is to carefully go over the pictures and dimensions we show for the 32-299 to confirm if it's the same.