Ingrid was kind enough to snap another image and it appears that the Prague proofhouse value is 1306g. So the difference would be 9 grams or about 1/3 oz. Another note is that the Belgians used units of Kg while the Austro-Hungarian folks used grams.



Also the mark just forward on the flats looks to be a "2/0" or something close. The tubeset knitter may have had the initials "AL"??

Kind Regards,

Raimey
rse