Yes, they have a "tin" taste. But i know this from many other rations. I belive this is normal. I opened the tin with a safety opener and i was very surprised, becaus there seem to bee some glue in the folded tin. ( Sorry, i dont know how to use words for this technical detail, hope you understand me)
Maybe i know the guy you got the spain ration pictures from

He is livin only 35 miles from me and his name is oli ? i am rigth ? We know each other only a few days by the german forum of military cars, but we hope to meet in real live.
I bought one closed an one opende ration. I am waiting for the postman. Hope to get them soon.
Rudi