alloy wheel sizing HELP

[thefirstcut]

so I have a set of Monza alloys. replicas
the internal markings have 5x100 and 5x112 on them
7j et35 made in italy also stamped
they only have 5 studs so can't be both sizes
how do I know what size they are??
looking to sell them but don't want to waste someones time if they don't fit

[jv]

Measure between the centre of two adjacent stud holes and divide that value by 0.5878. Result should be 100 or 112 with a bit of luck.

[thefirstcut]

thank you