You should be measuring through the centre.
Edit: From the photos it looks larger than 144mm, but the only reference I can find to such a thing is on Sheldon. That lists 151mm, but describes it as "Very old Campagnolo standard (pre '67) (Obsolete)".
@Brun started
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You should be measuring through the centre.
Edit: From the photos it looks larger than 144mm, but the only reference I can find to such a thing is on Sheldon. That lists 151mm, but describes it as "Very old Campagnolo standard (pre '67) (Obsolete)".