Welcome to the forum.
That's a beauty! If you own it, don't ever sell it, shoot and enjoy it. If you can buy it, do!
The 4" Kit Guns were not officially introduced until 1935 and those all have recessed chambers in the cyl.
That KG #529652 has a very low serial number and lives in a range where specimens letter either as a
.22/32 Kit Gun or as a .22/32 Heavy Frame target with a special order four-inch barrel. It's as though the company
hadn't yet decided what to call the model by the time it began shipping them. 529453 letters as
a special order HFT; 529488 letters as a Kit Gun. All four-inch prewar .22/32s with serial numbers
above 529500 seem to have shipped as KGs.
From the location of the serial number being on the forestrap, I would guess that the company expected
to build this one with 2 screw extension target stocks, then decided to issue it with small round butt stocks if the stocks are numbered to the gun,
and with a four-inch barrel.
Regardless of what the shipping invoice calls it, I would consider it a true Kit Gun because of the recessed chambers.
It has the USRA front sight, which was not used on six-inch 22/32 target revolvers but was one of the options on the four-inch Kit Guns.
Serial # 529438 on front grip strap with factory 2 screw target stocks and gold bead on the Patridge front sight blade.