Vtg Ramenzoni Brazilian Rio Grande do Sul Hat Men Green Military Pin Pinched 57

This listing is for a Vintage Brazilian Rio Grande do Sul Green Pinched Military(?) Hat. Coat of arms pin at the front. Lined interior. I believe the interior states that it's waterproof 'gaucho impermeavel'. Made by Ramenzoni. Marked Size, 57. Condition, Good pre-owned vintage condition / a bit dusty / crease at the top on one of the pinched sides / pinhole at the rim / discoloration at the interior / chinstrap is detached at one side and the other side has a few cracks - see photos for exact condition