interesting item. Whether there's a connection or not I'm unsure, but there is an entry under Grace's Guides for a Company by the name of York Flint Glass Co., at York - inception 1835 it seems - who specialized in 'accurate measures for medical and pharmaceutical companies'. This might possibly be appropriate in view of the size and wooden lid, but it is early so not sure, and the Company was wound up in 1845 it seems. I can't see anything in the period 1842 - 1845 in the Kew Archives Register - no Registered Design Nos. allocated to that Company.