Welcome to the forum.
The T and F do not look like they are perfectly aligned with the circles. This makes me think they were punched individually. There is no obvious indicator of any value. I wonder if this is some kind of factory tool check or tally marker.
The T and F do not look like they are perfectly aligned with the circles. This makes me think they were punched individually. There is no obvious indicator of any value. I wonder if this is some kind of factory tool check or tally marker.





















