here was clearly a Dreyse stocked by an amateur http://www.lauritz.com/da/auktion/dreyse-25756/i3969500/
looks not good but is important for me because I have a gap between 24xxx and 28xxx in serial number list
SN 25756 , thinks its 0,70"

if you compare it with the gun SN 30730 you will notice its a transition model having the old triggers

30730, the new trigger's

25756, old style triggers

but also the new slimmer receiver. in fact its now the gun with the lowest SN showing this modification.