Thank you got lot of info from you it looks the same as the mark you put on appart from there is a 56 stamp on mine ,makes sence that it could have been meant for fish as my great grandmother came from fishing community in Norway the dimentions are Length 32 cm with 15cm depth 3cm. Well the one I saw on ebay that you gave me a link to went for 3 pounds so not populare then never mine it has lots of sentemental value to me and I like it so that is worth a lot .