Any ideas why most old pocket watch voltage meters just go up to 50 volts?

THANKS,
Gary

 

Found it.
Testing old radio batteries, (DC) up to 50 volts.....

Thanks,

 

Found it.
Testing old radio batteries, (DC) up to 50 volts.....

Thanks,

Back in the days of steam radio.......
Max.

 

Lots of radio batteries went up to 67.5v or sometimes 90v.