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Aircraft instrument glass identification

I am hoping to identify if this instrument glass is aeronautical, and if so on what instrument/s is it used?

The label on the box gives the size as 1 15/16″ x 1/16″ x 2 3/4″ curved glass. It has two black dots with in the clear area of the glass

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By: Arabella-Cox - 22nd May 2017 at 19:24

It looks less an instrument face and more of an inspection window to me.

Perhaps the black dots were to indicate correct alignment of an internal component?

Anon.

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By: aircraftclocks - 22nd May 2017 at 13:16

Thank you P & P.
I can not find a fuel-air ratio gauge to match. I thought if could be off something like a standby compass, but again no matches.

Any other thoughts would be welcome.

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By: powerandpassion - 21st May 2017 at 12:03

Fuel-air mixture ratio gauge ? Black dots to stop damage during nestling?

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