Russian, etc

Russian slide rules often appear to be earlier than they are - their technology seems to have lagged behind the West and they were later adopting electronic calculators.

I have also included rules from other countries that did not merit separate pages.

NL-10-M Russian air force navigation slide rule, duplex, ten inch, wood and celluloid. Obtained from the Ukraine. Complete with brown cloth covered card case.

Russian artillery slide rule, made in Leningrad factory. Ten inch closed frame wood & celluloid. Scales are: β,N²{Sin,S&T,Tg,N}N,LgN//(Sin,S&T,Tg,N}. Further scales in well. Cm, 1:50,000, 1:25,000 rulers on edges. Black card case. Obtained from the Ukraine. Formulae on reverse.

LSLO-250-14M plastic ten inch closed frame slide rule made in Leningrad in 1977. Scales are: K,A{B,B1,C1,C}D,S,ST,T,L//{LL1,LL2,LL3}. Metric ruler on top edge. It has a green plastic case. Obtained from the Ukraine.

Russian KL1 pocket watch type slide rule. One winder turns both cursors, the other turns the dial in the right hand picture. Obtained from the Ukraine.

White & Gillespie (Australia) Model 432 Dual Face Comprehensive slide rule. A duplex rule made of wood and celluloid in a black cloth covered card case. Scales are: LU,L,A{B,C1,C}D,K,LL//S,A{B,T1,T2}Voltage drop, efficiency.

Australia

Korea

Denmark

Diwa No 301 Rietz ten inch closed frame slide rule made from mahogany and celluloid with a metal and glass cursor. It has a leather case. Scales are in,cm\K,A{B,C1,C}D,L//{S,ST,T}

Diwa No 511 Electro ten inch closed frame plastic slide rule. It has a leather case. Scales are: mm,inch\DynamoMotor,K,A{B,C1,C}D.Volt,S,T//{LL1,LL2,LL3}.

Hellerman 551U Darmstadt rule made by UTO. Ten inch closed frame plastic rule with magnifying cursor. It has a tan leather case. Scales are: in\L,K,A{B,C1,C}D,P,S,T//{LL1,LL2,LL3}. Shown as “New” in the 1963/4 Hellerman catalogue.

ΓOCΓ 5161-57 wood and celluloid closed frame five inch slide rule made in 1964. Scales are: K,A{B,C1,C}D,L//{S,ST,T}.

ΓOCT 5161-57 wood and celluloid closed frame ten inch slide rule made in 1964. Scales are: cm\K,A{B,C1,C}D,L\1:25//{S,ST,T}. It has a blue card case and a leaflet.

Leningrad ΓOCT 5161-72 ten inch wood and celluloid duplex slide rule made in 1974. Plastic cursor. Scales are: L,LL1,DF{CF,C1F,C1,C}D,LL3,LL2//K,A{B,S,ST,T,C}D,D1

Diwa 601-1 Rietz slide rule. Closed frame 5” plastic slide rule made for Motorola Semiconductors Inc. It has a leather slip case and a blue card box, both with the Motorola Logo on. The rear of the rule has the Motorola name on. Scales are: cm\K,A{B,C1,C}D,L//{S,ST,T}.

A Diwa no. 201 Reitz slide rule with its mahogany case. Ten inch closed frame slide rule made from mahogany and celluloid with a metal and glass cursor. Scales are in,cm\K,A{B,C1,C}D,L//{S,ST,T}.