This is a vintage Stewart Warner 12 V fuel gauge. It appears to be in perfect original condition. The glass That we see is 1 3/4" diameter. With the chrome trim it measures 2 1/4". It appears to be in working order as we tilt the gauge the needle floats smoothly from empty to full. With vintage mounting bracket. It looks like mounting bracket has protective tape covering a polished silver finish. I think the SW part # in tiny letters on upper face say Stewart Warner -426091 Made in USA ( Only the first digit (the 4) I'm unsure of)