Questions about Holland Fixie


I’ve just pulled my dads dads old race bike from the garage and i’m looking to restore it.
I’ve come here to get some info on the bike i’m trying to keep it as original as possible as it’s 65ish years old. I straigtened them as much as i could but the rear wheel has a fairly big flat spot is it worth or possible to get it fixed or should i just buy a new set?.
Here are some pics any help is appreciated.

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Is that an alan? keep that shit for real man, some old box rims oer whatevs. 700c?