Bharat, there were WAM-1 locos homed at SDAH. Pls Refer:
http://irfca.org/gallery/Steam/rmorris/roger_morris_diesel_electric/WAM1_20238CalcuttaSealdah25-2-92.jpg.html

Jimmy, these were WAMs, not WAGs.
Zubin: I think your confusing these with the WAG2's that were based at BSL. Those were scrapped in the late 90s.
Anamitra - was SDAH ever a homing shed? I thought it was only a trip shed.

A couple of these were there at BSL ( Scrapped) say about five years back.

Sachin bhai, this BBM/1 classification is based on the french classification for this class. These later became the WAG 1 series loco. They were originally imported from SNCF, france. Note the european style buffer and side window. You can see a pic...

Sachin bhai, this BBM/1 classification is based on the french classification for this class. These later became the WAG 1 series loco. They were originally imported from SNCF, france. Note the european style buffer and side window. You can see a pic of this loco here:

http://irfca.org/gallery/Locos/Electric/wag1_2_3_4/umax43.jpg.html

These were called as BBM-1 and later renamed as WAM-1. They were based at ASN and SDAH till early 2000 before being scrapped at KPA workshop one by one.

Sachin, if I recall correctly, these later came to be known as WAM1's. They were found mostly on ER.