Unpriced hat, only had 1 price suggestion (excluding mine), which is 4 years old and was rejected.

It was sold on Marketplace for 95$, which should be ~53 Keys when we calculate it marketplace's key price of ~1.79$.

I can confirm the sale, since I am its new owner.

Proof:

Vintage Tyorolean: https://marketplace.tf/items/101;5;u66

Marketplace Key Price: https://marketplace.tf/items/5021;6/Mann%20Co.%20Supply%20Crate%20Key

I could not find anything about the other 3 exisiting OC Tyroleans.

I want to thank ✪Wrein and Offline for helping me with the suggestion.

Have a nice day.