I still use my Luna-Pro SBC as well! (I mis-characterized it earlier as a "Luna-Six SBC"
) I'm glad it uses a readily-available 9v battery, and I like the Zone VI dial feature. I recently had the meter re-calibrated at Quality Light-Metric in Hollywood, and it just keeps working like a champ.
If people today would find the paperback consumer's edition of the 1970 Leica catalog hard to believe, imagine their reaction to the dealer's edition! I haven't seen it since I worked at the camera store, but I recall that it was massive, and ring- or post-bound for updates. As long as we're walking down memory lane, remember the Morgan & Morgan Lifetime Photo-Lab Index? In the 70s that was quite a massive notebook, and a great resource.