Weston Vl or V for reflected light or Sekonic L398 as incident. There was also the Gossen Pilot that used a selenium cell. Can't remember the model. Both of these would be fitting for an older camera and have been around in one form or another since the fifties.
If you go for a Gossen I'd get one that used a contemporary battery.
Get a modern-day meter that can offers both reflective and incident metering. Get something with a large display. I've used a lot of Westons and found them to be reliable and accurate. Here's why I stopped using them:
The Zeiss Ikon Ikophot is a very good meter, provided you find one that is working properly. The Ikophot T is very good. It uses a 9-volt battery, is accurate and very easy to use.