Slide rules HOME page COLLECTION 10" RULES OTHER COUNTRIES
Make Graphoplex, France
Model 690 a Neperlog
Notes

This rule is good quality duplex rule with 26 scales. This makes it equivalent to an Aristo 0968 studio or a Post Versalog 1960.

Front view
1030-graphoplex-690a-01.jpg (35854 bytes)

Detail - left front view
1030-graphoplex-690a-02.jpg (34809 bytes)

 Detail - right front view
1030-graphoplex-690a-03.jpg (48175 bytes)

Back view
1030-graphoplex-690a-04.jpg (37443 bytes)

Detail - left back view
1030-graphoplex-690a-05.jpg (34338 bytes)

Detail - right back view
1030-graphoplex-690a-06.jpg (40327 bytes)
Manufacturing date c 1970
Length 25 cm
Material Plastic
Scales: front LL01, LL02, LL03, DF [CF, CIF, K, CI, C] D, LL3, LL2, LL1
Scales: back LL00,L,T2 [B, T1, SRT, S,C } D, P, DI, LL0
Cursor Plastic
Documentation Full documentation (leaflet)
Condition Near mint