47model is modeled by many jeans brands.
This model can be further subdivided the age by sewing the front fly.
-1947 : Cut-off type
1947-48 : locking type
1948-52 : folding type
Since there are few cut-off type and locking types, you should buy them when you find them.
In the future, the day when it will become common to be called “47 early” or “47th late” is not far away.
I recommend checking not only the vintage you have, but also the replica jeans.