Door Jamb Stickers US Options

[356drb]

Please forgive me if this has been discussed in the past. If so please direct me to the information.

I have found five types of door jamb stickers on US spec. cars. They are:

914-6 -- all are silver and have Porsche as the builder

The 914-4 types always say Volkswagenwerk AG

914-4/1 -- silver or black and do not have gross or axle rates -- used through at least 11/71

914-4/2 -- Says TYPE PASSENGER CAR lower right -- have only seen one dated 5/72 and has the weights and was black

914-4/3 -- Says TYPE PASSENGER CAR at the top, has weights and is silver or black -- have many data points from 8/72 - 12/74

914-4/4 -- Says TYPE PASSENGER CAR lower left, has weights and is silver or black -- used by at least 4/75

The silver and black seem to be used randomly (except on 914-6s). I have one of each dated 12/74. Any clues?

Does anyone know anything in addition and/or can you provide additional dates that can fill the gaps above?

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[wonkipop]

regarding silver or black stickers being used randomly.
i would hesitate to use the word "random".
the vin number and manufacture date are displayed using clear holes in the sticker which reveal underlying body colour.
to do this legibly you need to contrast body color with vin sticker background colour.

legibility would likely be requirement of regulatory authorities.

either silver or black background stickers cover probably most of the standard body colors to produce legible vin numbers?

i would guess, and it is just a guess, that the silver stickers go with certain body colours and the black with remaining body colours. and that might cover all the options.

i think an interesting line of inquiry would be what body colors are silver stickers found on and what body colors are black stickers found on.

just a thought - in terms of restoration rigour.
i'm going with davep's suggestion.