Hi,
thanks for your reply.
The word underneath Calcutta is Manufacturer.
A quick Google search on Osler Caluctta, bought up results for a chandelier manufacturer whose company was founded in 1807
They used to produce some "magnificent" chandeliers, however ceased trading in 1922.
They had a few showrooms here in the UK and 2 in India one of them being in Calcutta.
Maybe it was a box that held chandelier cleaning equipment.