shop, printing establishment (Ex officina Gulielmi Young, bibliopolae, no. 52 Secunda-Platea, angulo Castaneae-Plateae, M.DCC.XCIII = From the shop of William Young, bookseller, 52 Second Street, on the corner of Castanea Street, 1793; In officina Sylvani Otmari = [Printed] in the shop of Silvan Otmar)

a monetary workshop within a mint.

A workshop within a mint. Most mints had several workshops and it seems that it was sometimes useful to be clear about who had produced which coins. Therefore, mint marks often included this information.