Been a while for some old laser porn, and this one's a bit obscure. It's the Laser Newsletter, the first issue of the first newsletter for the growing laser industry from January, 1964. That's a full year before Laser Focus sent out their first issue. Anyway, it mentions the 16mm film "Principles of the Optical Maser" linked below, and the Optics Technology model 610 laser power meter seen below. Think about all the periodical publications now dedicated to the laser industry and all its applications. I have a bound volume of them through October, 1968.
https://www.youtube.com/watch?v=vuORqMb481k