It's entirely possible. But if you look at the back edge of the crystal, it doesn't have the extra case bezel that the modern glassbox does - the crystal instead drops straight into the case.
My 2447:
View attachment 1513821
My 160:
View attachment 1513822
Notice the extra little hump between the crystal and the case on the glassbox - it looks to me like it's not on the watch he's wearing.
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