I'm hoping someone out there has a manual for this meter or better yet someone has experience with this model. It's a Honeywell Pentax 3/21 Exposure Meter. I have sourced the hard to find batteries and low and behold it works!
Am I reading the meter correctly:
If I partially depress the read button on a bright scene I read the EV from the high scale. For a low light scene I need to depress the read button fully and I take the EV value from the low scale.