You are correct - there are 25.4 mm to the inch.

Marshall = Ruskin

I'm about to install my Pertronix Electronic Ignition gadget and as = Pertronix is a US co. they put the instructions in English measures and my gauge = is metric (Pertronix has no email listed on their web page).  Can = someone please confirm that .03 inches is .762 mm?  I need this to "gap" the new ignition mechanism.  Thanks.  = Malcolm Stebbins