This is a Vintage WW 2 Era Corp. Bendix Co Rate Of Climb Indicator #AN 5825 3 Indicator. I was told this and the other gauges I have listed on Ebay came off of WW 2 Era Sea Planes but they couldn't tell me anything more else about it. This is in decent looking condition but is untested. Please examine all the pictures and contact me if you have any questions. We will be happy to save you shipping costs by picking this up at our shop. Thanks for looking.