Rob I would be amazed if there is not a reasonable amount of weight variation in these items. Yours is only 4.3% away from the amount Peter gives for his example. So I am aure that it is a match to the first one shown. You can ignore the signature "Mærkat 388" which means "Label 388" which refers to those little Danish flag paper labels that some people tell us means it was made in March 1988 - so it is not actually signed but would have had a label. If you are truly worried I would email Peter and ask him how much variation is likely from one piece to another.
Ross