Since I posted my query and received an underwhelming response, I drove a 1931 Model K Lincoln Sport Phaeton and discovered the answer for myself. 1932 was the first year Lincoln had a synchromesh transmission. In 1931 Lincoln used an ingenious system that is very close the synchromesh. Lincoln employed a free wheeling device that could be cut in and out by a button located atop the shift lever. With such a device you have the ability to shift up without double clutching or crashing of gears. You can downshift without matching engine speed and double clutching is unecessary and with no crashing of gears. Also, you should be able to shift without using the clutch.
