I still use a Lunasix 3 lightmeter for my film photography when using old fully manual cameras with no built-in TTL meter and it works well enough.
The problem with a lot of the Lunasix range is that they use the old 1.35 volt mercury batteries that have been unavailable for years due to environmental concerns. As usual, there are some work arounds for this including air-cell batteries, but these are expensive and only last a few months. Fortunately, my meter came with an adaptor that allows it to use two silver oxide SR44 batteries and turns the voltage down to the right level. I think you can still get these adaptors but I think they're getting on for around £30 so not exactly cheap.