Glad I finished hanging the lights in the shop [10 years after buying the place HI]...the transformer is also labeled PSC-150 and the choke also has RS-1850. Both of those engraved into the respective bottom plates...740VCT at 150mA...maybe enough for a Ranger-class final.
Those numbers are standard Chicago catalog models. The choke is 8hy 150ma, and I'll check what the xfmr is. I'll let you know. I have the same pair on my shelf.