Yours is missing the bezel around the slide rule dial....I own one of these too plus the pattern generator, but got them in reverse order. I paid $15 combined on my pair.
There is no FM generator in these IIRC just several CW RF markers with no modulation. For TV alignments you need a FM sweep gen and 1 or more CW marker gens (most TV marker gens had multiple independent oscillators) Early tv alignment gens tended to have separate sweep and marker generator units, but later devices like the B&K 415 started putting both in the same box.
I've got better SS alignment gear, but ended up saving basically half a rig since it was cheap, and I knew the guy that had it was likely to throw it out if I passed.
I wish I could help you, but I've got zero lit on mine.
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