You are buying an excellent used Smith's water temperature gauge as pictured. Part # BT2220/02 which fits 1972 - 1976 MGB's and also Midgets ( I believe ). Please LOOK at photos and compare to yours before purchase. It was tested with 12 volts and the needle moves smoothly. I took the glass off to clean it so it will need new sealant around chrome rim. The rim cleaned up nicely but does have some minor pitting which may clean up further. 

 $10 SHIPPING ( 50 STATES , PR ).