Whose Steyr Front Sight Hood?

Here are three Steyr front sight hoods. Can you tell which one belongs to the Mannlicher Schoenauer 1950, Steyr Zephyr 22 Mannlicher, or a Re-Production?

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The hoods belong to Mannlicher Schoenauer 1950, Re-Production, and Steyr Zephyr 22 Mannlicher in the order left to right in the images. I can only tell them apart by their exterior finish (i.e., the Zephyr's a little rough and the MS 1950's shinier). The one which looks the best turns out to be the Re-Production.