Description - PM type 16 (JC) PM type 21 (RF) urban Bombay duplex consisting on right side 4 concentric ellipses with figure 1 within (sometimes missing or faded). Opposite is Letter D or OTTW or DN, with date but no year

This Bombay GPO PM, Cooper records its usage as between 1874-75, and considers perfect examples scarce.

However, examples are found in this collection dating from 1873-77, with earliest date noted 29th December 1873, and the latest 15th June 1877. As no year is found on this PM date range is more difficult to ascertain.