I'm not NYPD but the Glock 17 is the issue duty sidearm, with I believe the 19 for women-small handed officers and plainclothes.
I have heard older cops can still carry the S&W Model 10 or 64, or Colt Official Police . I would gather not many still do but older officers can carry the revolvers if they already have been, but new officers can not choose the revolver over the Glock, kind of like the revolvers are "grandfathered" in for veteran cops who had them for years.
There is some confusion over the "NY-1" marked S&W 60's and 64's with DAO hammers, S&W says that these were bought by the NYPD for sale to officers as off-duty weapons, and they were never intended as duty guns. Many were not sold and returned to S&W for credit,S&W then selling them off as surplus..... and still more were sold off by NYPD cops who had bought them. Up until recently the NY-1 64's were pretty easily found, and still are but not as common as they were.The 60's are even tougher to find.They carry no real collector interest except to avid S&W collectors or police revolver collectors (like me). I think J&G sales bought a bunch of them, and I have yet to find one at a gun show.
I have also seen Ruger SP-101's and Service Sixes with DAO hammers marked NY-1, I assume also for sale as off duty weapons.
I do alot of research about police revolvers, but know next to nothing about any semi auto pistols or off duty carry guns.