1965 GT350 original Delco tachometer

[kram350]

Original tach. No issues, works as it should. Bezel nice, some clouding on the glass, but barely noticeable. Light bulb holders there, never appears to have been apart. $5,500.00. 

[texas swede]

Light bulb holders? I thought the original tach has an internal light.
Are you talking about the light holders for the oil pressure gauge?
Texas Swede

[mygt350]

If memory is right, there is a molded bulb holder (think its black) that slips into back of tach. Oil pressure lighting is from a bulb mounted to side of oil pressure gauge.

[texas swede]

Martin,
My original tach has an internal light and I looked at some pictures you sent me many years ago and the backside doesn't show any signs of a holder. There are two holes covered by some silver tape though.
Texas Swede

[mygt350]

Under the 2 round silver foil disks is where the black twist in bulb holder is. It does not have any wires and simply holds the bulb in place. Am looking at a never used Service Replacement Tach. Thus, it is a internal lamp, but it is under the foil which can be gently be peeled back to access the holder to replace a failed lamp.

[kram350]

Under two foil disks there are black bulb holders that twist and lock into place onto the circuit board that powers the lights.

[texas swede]

You are both correct and the lights are internal to the tach.
My bad, misunderstood the post.
Texas Swede