Wow! Antique-shop.com forums are in the big #1 spot on Google for the search term "antique shop forum", for 4 years running!Thanks to YOU.
Sorry it's 6x3x 1 5/8. I'm in Huddersfield, West Yorkshire, England. I honestly haven't got a clue what I've got so all your help is great! You can only see the back of the hinges because the inside is covered up, hope these pics help!