RUSSIAN SLIDE RULES by Sergei Frolov

MEDIUM SLIDE RULES #3

27 cm (10 1/2"). Gost 5161-72. Year: 1986 (!)
Details: Front side | Back side

27 cm (10 1/2"). Gost 5161-72. Year: 1978
Details: Front side | Back side

31 cm (12 1/2").
Details: Front side | Back side | End face

25 cm (10"). Slide rule with Finnish inscriptions. Year: 1949
Details: Front side | Back side

25 cm (10"). Gost 5161-57. Year: 1968
Details: Front side | Back side

NEXT: MEDIUM SLIDE RULES #4

Last update: 2001-07-07 12:29
© Sergei Frolov, 1998-2001