I have come across this interesting item on Ebay and wonder what it is for? Perhaps some kind of 'weights and measures' inspection, or something?
http://www.ebay.com/itm/160865018551?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649#ht_6671wt_1142
Any ideas? It is not my sale, by the way, I'm...