There were 2 production runs on these. It seems like this is a 2nd generation build which lacks the warble and frequency drift along with other problems that plagued the 1st production run. The finals on these radios would commonly "pop" resulting in no transmit. The secret is, prevent static shock. Connect your grounded antenna FIRST, then connect power cord. Turn on power supply (a good one like Antron) and then finally turn radio ON.

Cobra Electronics (Chicago USA) manufactured the
COBRA 200GTL-DX in the Philippines from Summer 2003 until Winter 2007 and was the first Cobra multimode transceiver utilizing "NightWatch" technology. (as read on the internet)

Cobra marketed it as a 10 meter ham radios (not sure how they can claim that with a roger beep and echo installed), competing with Uniden and their 2510/2600 series radios. There was a modification to easily take it down into 11m meters as you can imagine 99.9% of the radios were exposed to.

This is from a silent key.