OB-1 to match a 30 year old McDermott?

[Bastian]

Hi folks,
I'm looking for an OB-1 for an old McDermott sneaky. The pin appears to be a 3/8 by 11, but I can't be certain. Does anyone know if McDermott has always used a standard pin or could I be dealing with something else?

 

[DawgAndy]

if it's a McD it's a 3/8 x 10.

 

[Handsumm]

You can buy a blank and have it matched to about anything.