Hello pwm,

No catalog but a weblink http://www.internetgunclub.com/general/HistoryDetails.php

The Manton showroom in Calcutta was bought by an Indian group in 1947 after Independence and existed until very recently over there. I could put you to the people who bought the assetts of Manton, O C Daw, G M Biswas etc and amalgamated them into one company if you want.

Good hunting!