US Schermack Control Perfins

Perfin Image
Cover
Number of Holes	9
Missing Pins	1
City	NY
Company	Unknown
1906 Series 314
1906 Series 320
1908 Series 343
1908 Series 344	1f
1908 Series 345
1908 Series 346
1911 Series 383
1911 Series 384
1912 Series 408
1912 Series 409	1f
Total Count	2
Total Count On Cover
Earliest Usage	7/1/1910
Latest Usage	7/1/1910
Comments	This very rare pattern has been associated with Spencer Trask. I'm not sure why ? . They continued to show usage of Des 90-1 after the Des 90-2 reported date of 7/1/1910. Must have been reported on cover at one time. Possible blind perf ?? I'd like to see one.