French Spring scale

with only one way to weigh.

Never saw such scale before... so I am happy if a collector can help !
The graduation look like old French lb, so I would date the scale before 1793.
She has fine engravings... but not all is still visible ! I can see some letters which look like
I L B P B F.... no idea ;-(

She has a fine designed pointer... as last she is all over fine styled.
I like the system how the spring move the pointer. The spring is off center attached to the pointer center plate and move this way
by weighing the pointer.

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