Golden Pinto fork question

I’m working on bringing a Pinto back to life. The frame and fork were sourced separate. I’m to the point of putting a front axle and wheel on it but I’m hitting a snag. Can someone tell me what size bolt/axle would’ve been in this thing originally? The tubes that the axle slides through seem to be elongated or bored out from use. What I thought was 3/4” measures to be 11/16” in other spots. Would this have originally been a 5/8” axle and has just been bored that much from riding over the years?