Ah, I found better info for you.
“Deliveries of the P-35 to the USAAC were exceedingly slow, and it was not until the spring of 1938 that the 17th, 27th, and 94th Squadrons of the First Pursuit Group actually received their first P-35s. In the meantime, the USAAC was becoming exceedingly nervous about Seversky’s tardiness in meeting production schedules and decided to hedge its bets. On July 30, 1937, the USAAC ordered 210 Curtiss P-36s, a production version of the Curtiss Model 75 which had come in second in the 1936 competition.
The last P-35 of the original order was delivered in August 1938. After flying for a few months with the 1st Pursuit Group, the P-35s were redistributed among squadrons of the 31st, 49th, 50th, 53rd, and 58th Groups, pending the arrival of the P-36 fighters into service.”
There is other info on the P-35 in this file, it is rather huge and will take a while to download, and alas, it is full of text encoding errors (although it is legible generally).
BTW, I don’t think that info is correct about the P-35 being redesignated the A8V1. Read my prior cite, it’s all in there.
Oh, and BTW, I found all this on Japanese search engines. You should see some of the cool Japanese websites like:
Hmm… looks like variants of the P-35 won the Bendix Trophy in its category from 1937-39.
I’d cite more of these pages but they wouldn’t be of much use to you unless you can read Japanese.