Hi guys.. sorry I don't have much information on the parti's for you but I can talk to you about the Biewer weights. I've imported 14 Biewers so far from Germany that either live with myself and my family(my sister or my parents) or they live with my two friends here in Minnesota.
Many of them were sibling groups, meaning we bought at least two from a litter so they wouldn't have to travel alone. Two of the Biewers are still puppies so I'm not sure of their weights (their only 14 weeks old) but they look like they'll be around 4.5-5 lbs, both males.. The rest of them are all at least a year old. Out of the 12 that are at least a year old, all but 2 are under 5.5 lbs, 1 is under 6.5 lbs (female) and then we have two larger females that turned up over the standard 7 lbs.
Consistancy in size is a goal on the list.. it's going to take some time. I myself am trying to breed for the 5-6 lb size.. not to fond of the tiny tiny things.. would rather have stocky cobbie bodies so that's what we're breeding towards here.
Hope that helps you.
-Diana