Interesting old piece, i had purchased a litttle Colt pocket in this (.32colt) caliber a few years back. It's mfg date is 1905, not much of a collecter as it had been reblued, but it looks brand new and the wife loves the light weight and small size. I found this police positive couple of years ago, and bought it only as a mate to the pocket which is a much smaller gun, not in quite the condition of the wifes, but all original and like the wifes has perfect old pre war Colt plastic grips.
Couple of quick notes for those of you not into old Colt DA revolvers, (far from an expert, but i think we all like to share this stuff) the "flat latch" thing refers to the cylinder release, which Colt used in the early part of the century, before going to the round release that has been used every since. The caliber is not the same as the S&W 32 (or as good!) that when used in Colts was called a 32 new police, and is not much of man stoper, i like to say you can step outa the way. Also the "positive" refers to the saftey feature that lets you carry six rounds, my understanding of this, and its all antidotal as ive never been able to document the fact, but told that this feature that of course is common on all revolvers today was first introduced by Colt in the positive feature revolvers. Hard time documenting the age of this one as opposed to the wifes, but best guess is circa 1920's.
FYI stuff; the wifes old piece is NOT a positive, and thus has to be carried with an empty round under the hammer.. Also the balistics are so bad, and rounds so limited in .32 colt that just in case she ever has to use it i did the old "dum dum" thing with the rounds in her piece.. Told her if she ever had to use it to keep pulling the trigger till it stops going boom.. Dont want to have to explain the rounds, i can Just see how that would look in a court of law.