Horizontal Situation Indicator Model RD-350H by Sperry Instrument (4014185-902)

Disclaimer: This is an official (OEM), used flight instrument. This instrument was last used as part of an expertly-crafted, fully-working flight simulator created by an electrical engineer. This part was fully functional the last time it was used, but unfortunately I have no way to test it now. I accept returns within 30 days of purchase.