French vintage scale to weigh letters and small parcels. 
In good useable vintage condition, although it has not been calibrated the measure system works. 
The weighing plate on top is removable and sits a bit wobbly, but I have weighed a variety of objects successfully so surmise this is the design. 
Marked 'Paris' I imagine it would have been used by a grande Parisian household or boutique to weigh its post. 
It has some age related marks and is clean, but could be cleaned further to romove them if desired. 

Parisian vintage postal scale