There was an "initial production" version of the Tiger that was issued to the 502nd, 501st and a couple to the 503rd. These Tigers have a great many detail differences from the production versions.

Heng Long's first Tiger produced circa 2003 had the TK01 board and no mounts for the smoke and sound equipment. They also had multi-colored gears and brass colored drive shafts and the high speed black capped Suntechs. Later versions had hull reinforcements, mounts for the smoke and sound equipment and white gears with chrome plated shafts.

Correlating the real ones with the Heng Long doesn't really work. If anything Heng Long backdated the latest Tigers when they added straps to the sides of the rear bin.