I am renovating a set of W&T Avery coin-freed 20Stone upright scales. The type No is 3802 CFP machine number 52527. Any information, such as date/place of manufacture would be appreciated. They use old pennies and those inside the scales are dated from 1902 to 1960's. I have been able to get the scales weighing properly, but the coin-freed mechanism has been removed to I need to replicate the original so that they only weigh when penny is inserted, at the moment they weigh without coins inserted.
