kcw1939: Vortograph No. 02
kcw1939: Vortograph No. 03
kcw1939: Quantograph No. 87
kcw1939: Vortograph No. 04
kcw1939: Vortograph No. 04 c
kcw1939: Quantograph No. 90
kcw1939: Quantograph No. 89
kcw1939: Quantograph No. 88
kcw1939: Quantograph No. 91
kcw1939: Quantograph No. 92
kcw1939: Quantograph No. 94
kcw1939: Quantograph No. 93
kcw1939: Quantograph No. 95
kcw1939: Quantograph No. 96
kcw1939: Vortograph No. 05
kcw1939: Quantograph No. 97
kcw1939: Quantograph No. 99
kcw1939: Quantograph No. 98
kcw1939: Vortograph No. 06
kcw1939: Vortograph No. 07
kcw1939: Vortograph No. 08
kcw1939: Vortograph No. 09
kcw1939: Vortograph No. 10
kcw1939: Vortograph No. 13
kcw1939: Vortograph No. 12
kcw1939: Vortograph No. 11
kcw1939: Vortograph No. 14
kcw1939: Vortograph No. 15
kcw1939: Vortograph No. 18
kcw1939: Vortograph No. 17