90YJ water temp Gauge

could someone tell me the numbering on the stock 90YJ temp-gauge,
as far as the incriments go,
im floating just above 210 and sometimes hit the next bar
on long grades on the highway, got me wondering, what temp im hitting,
i had a guy at a radiator shop check my temp with a
heat-gun-sensor-doohickie,,(sorry not up to date)
and told me my system was fine but who knows,
but that was sitting still,
thanks,
johnp
sorry for all the dumb questions