Pittar & Company, 12, Old Court House Street, Calcutta.
First mention 1831. Last mention 1848.
The book also shows a picture of Pittat & Company's mark with the same tally mark on a Kings pattern dessert fork.
Twentyman, Beck & Company was located at 4, Tank Square, Calcutta.
Twentyman & Company is also shown at 4, Tank Square, Calcutta until 1836.
Thereafter: 3, Hare Street, Calcutta.
The book does not give much information on the partnership.
However it does make an interesting statement. I'm going to quote now so you can draw your own conclusions.
"Tally mark #22, crowned lion passant, maker's mark TB&Co. for Twentyman, Beck & Co., lion rampart holding a crown. The lion rampartmark is a reproduction of the crest of the East India Company, and may have been used in very much the same way as a Royal warrant is used today to indicate official patronage. I have noted a crowned lion passant only with this firm".