I might be wrong, but it looks like 530 hrs to me.

"Gould 0738" wrote in message
...
Just like an analog clock.

I believe the large (blue) hand advances one mark around the perimeter for
every engine hour.

In 60 hours, the large hand will accomplish an entire circuit of the
gauge.

The little hand (white) keeps track of the number of 60 hour increments.

I think the meter reads 505 hours.