YES ... UHF Amplifier, likely for FM service (Class C)
15 watt INPUT (Max) for 40 watt OUTPUT.
Jim Eagleson worked at KLM in that era (1970s)
http://members.surfbest.net/eaglesnest/resume.htmThese amplifiers were designed by Ken Holladay, K6HCP (KLM, Mirage, RF Concepts and now JK Designs).
"KLM" stood for Ken, Leeland, and Mike.
The original company group of Ken Holladay - K6HCP, Leeland "Mel" Farrer - K6KBE,
and Mike Staal - W6MYC.
The amplifier line was eventual acquired by Mirage (late 1970s),
then MFJ acquired Mirage in 1990s.
KLM VHF (2-meter) Amplifier Manuals
http://radiopics.com/1.%20Manuals/KLM/KLM%20Amplifiers.pdf