A00000009B, B00000009B, C00000009B Three Note Experimental Set Fr. 1607 $1 1935 Silver Certificates Matching Serial Number 00000009. A neat set with all three blocks for these experimental notes with serial number 00000009. The A-B block utilized distinctive paper with a special finish and was printed from March 16 to April 28, 1937. The B-B block consisted of special paper and its printing was from November 26 to December 10, 1937. The C-B block was printed on regular paper as the control group. Printing for the latter was between December 1 to 10, 1937. The A-B grades Choice CU, the B-B XF with staining, and the C-B grades VF-XF with staining.