They are all nikon F its just the finder that changes as for how much its worth better checking ebay for sold ones and also depends if the meter works.
Not to split hairs, but a 73xxxxxx serial number for the Apollo F could be from '72 or '73. The first 2 digits of the serial number don't necessarily indicate year of manufacture. ...
There were other internal and external changes along the way from 1960 to 1973. The front nameplate, for instance, was changed in the production run for those that were post-Photomic FTn head to provide a channel for the head retaining claw at the front. My 1961 F cannot be fitted with the FTn head without changing the name plate.
G
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So it's a FTn Photomic made in 1973
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