In Fountain Pens and Pencils, Fischler & Schneider show photos of various Waterman nibs. We are attempting to expand on their reference work.
F&S state that New York Imprint nibs were in use uto 1918, when they were replaced by the "REG U.S. PAT. OFF." imprint. We'll start with some New York variations.

Pens currently holding these nibs (or holders with these pens to use older terminology) are:
NY-0 22, BCHR (3 fissure feed, no Globe in barrel imprint)
NY-1 12, MHR
NY-2 22, BCHR
NY-3 22, BCHR
NY-4 12PSF, BHR
NY-5 0852 1/2V, BCHR
Next in the progression are the "REG" imprint nibs.

REG-1 52 1/2, BCHR
REG-2 452 1/2 V
REG-3 52, BCHR
REG-4 0552 1/2 V
REG-5A Olive Ripple desk pen
REG-5B 52, Red Ripple (No Ripple imprint)
These are all #2 nibs to eliminate variations that are due to nib size. Next up will be some of the larger size nibs.
Hope this is of some interest and value to vintage Waterman collectors.
Dennis B and JRG
