From which aircraft does this vintage altimeter come from? I bought this vintage U.S. Navy Kollsman altimeter at a market in Bangkok, Thailand. 


Unfortunately, I don't have any info other than what you see in the photos.


It's a Kollsman altimter and the model or serial number is KO-67ICLU-035 Type/6433 MB-I


There is another serial number(?) on the scale which reads MS28044LI, and below ALT it reads 50,000FT.


Here's another clue: This sticker says the altimeter was serviced in the PNCLA (Pensacola) 89771 NAVAL AIR REWORK FACILITY in the 3rd fiscal quarter of 1981.  


Another sticker says it was tested at the Naval Air Rework Facility Pensacola (NARF) and found to be free of radioactivity, also in 1981.


Finally, S/N-71 is embossed on the backside of the altimeter.

So what type of aircraft could this instrument have been part of?
What you have is a Kollsman C-12 altimeter manufactured by the Square D Company in Elmhurst, New York. The 50,000 FT marking below the Military Standard number means that the altimeter is accurate up to 50,000 feet of altitude but this number might far exceed the capabilities of a particular aircraft as it was universally used on many different types. The free of radioactivity sticker means that this instrument does not have the radium dials found on earlier models (common on WW-2 instruments) or, was later retro-fitted with a non radium face. Since you purchased this instrument in Thailand I am suggesting it came from a T-28 Trojan. The Royal Thai Air Force operated 120 T-28s from 1962 to 1988. The United States Navy ceased T-28 operations in 1984 but by then many of their T-28Bs  had been modified into "Ds" as counter insurgency aircraft and shipped abroad. Since the Thai Air Force recieved all their aircraft from America, there is a excellent possibility that your instrument came to Thailand either in a ex Navy T-28 or as a spare in a support maintenance package.