Help! Anyone know about this instrument?

[TnMike]

This instrument is in an RV4 I recently purchased and I can't find anything about it or the company. It is wired directly into the altitude encoder and I don't know its function.
Thanks for your help, Mike

 

[Jesse]

http://www.matronics.com/forums/viewtopic.php?p=252120&sid=0e5d64a1e3b71b6ff09a2d43f011cb42

 

[TnMike]

Thanks

Jesse, That was a good link to needed info and was my guess in the beginning - seems to be working so it'll stay for awhile.
Thanks,Mike

 

[KatieB]

You come up with the weirdest stuff, Mike!