Most high end Charles Daly guns made by Lindner seemed to have Lindner numbers. Maybe the Sauer made guns from Daly had Sauer numbers. Sauer numbers are listed in various articles in DGJ authored by Jeff Stephens. The chart in issue 15-4 is not very definitive on early years, but later articles by Stephens may shed more light. Manhattan Arms marked guns of very high quality are much more scarce than lower quality guns similarly marked.