This nice scale was made
in GDR and was in use for count weighing for small items. You can weigh
heavy load with small weights ( 1 gram = 10 or 100 gram ) or you count ,
as example screws.
If you fill 5 screws in the 1:100 load bucket, you have to fill so long
screws in the big load pan until the beam is in balance. Than you have 500
screws counted.
The ratio of this system is 100:1 and 10:1