Would a decal last 40 years outside in the elements?

[Goose331186]

So I recently won a helmet with a letter of provenance from evrecy Caen

It was found in 1983

I was wondering your opinion on if a decal would somewhat survive after that long?

I keep trying to add pics but it says file size too large

Im new so any pointers would help

[Max]

Use this to reduce file size
hqttps://www.img2go.com/compress-image

[Goose331186]

20210609_112139.jpg

Let me know if this worked

[Carl Schwamberger]

Short answer is, its possible. Variables are what the decal was made of, what its exposure to Oxygen & water or other chemicals were. Frequently items buried in wet & Oxygen free ground are remarkably intact after even centuries. Then there is how Alkaline, Acidic, or neutral the ground is. The decal itself may be made of unstable compounds that break up even without outside influence. Others may of very stable materials.