Yes. I would conclude that the barrel is East German made and 5,53 is the date. They are excellent barrels although some I've seen showed mill markings around the raised area where the sight is mounted. That in no way effected the accuracy.Doubs ---- I was able to get ahold of a stronger lens to look at the fine lettering on the "XX" out numbered luger's barrel. The numbers "8,83" under the barrel I thought were the bore diameter numbers in mm's are the numbers "5,53". I'm sure that isn't the bore diameter. Could that be a date number for May 1953, as you mentioned earlier? I'm not trying to make something out of nothing or my imagination.