1. My Pentax V reads 12.6 with a set of batteries that have been in for a couple of years.

Should my "14" reading suggest I should replace? Since the needle "swing" is further to 12 vs. 14? The right to left needle travel is something to get used to also.

3. The scale in the Pentax is truly EV when the ISO is set to 100.

I just set all meters to ISO 100, and with your other suggestions everything agrees between all meters. The ISO in the other comparisons had a 400 setting, thus the Gossen Vs. Pentax 2 stop difference.

Thanks for the response.