Coin scale
Pic  CS 55

US coin wipe, sew saw scale 
made of brass. 
John Allender
Patent Pending

This kind weigh 6 gold coins
1,2,5,10 and 20 gold $

You need a small counter weight which fit in the $1 slot. This weight is needed
to weigh the 10 and 20 $ coin !

This hard to find weight is often lost,
so also by this scale ;-/ 

21.8 cm long

The 10 and 20 $ slot

The 1 $ slot which hold also the counter weight

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