That is a mod 21H. In fact the correct term is model 721. H&F were designated to the rifles in the USA catalogues. It has a round receiver, and the bolt handle would not be bent for scope use.
1948 saw the change to the integral dovetails with a bent bolthandle, additional bolt guide and groove in the receiver. At serial number 23000 this took place.
View attachment 274059
Here the differences are clearly visible on my 6,5x57 and 7x57.
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Note the progression from round receiver Mod21 to 22 to ZG47.