Curta Type 2 - Varianten • Variations of Curta Type II
1947 ---------------- 1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
---
1968
1969
1970
1971

Total 61660 units

Prototypes2
500001
(500002)
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561660
(561655)
Setting knobs •••••••••••
10519
17.06%
      
500001
(500002)
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510520
(510505)









Setting knobs •••••••••••
1379
2.24%
      

510521
(510536)
511902
(511902)







Setting knobs •••••••••••
49760
80.70%
      





511903
(511904)
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561660
(561655)
Small numbers
10519
17.06%
      
500001
(500002)
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510520
(510505)









Large numbers
51141
82.94%
     





510521
(510536)
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561660
(561655)
Black body
10519
17.06%
      
500001
(500002)
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510520
(510505)









Grey body
51141
82.94%
         



510521
(510525)
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561660
(561655)
Crank metal short
3150
5.11%
      
500001
(500002)
503150
(503114)
                        
Crank metal short (with arrow)
1300
2.11%
         (503164) (504433)                        
Crank metal long 
(with arrow)
13380
21.70%
        
504450
(504492)
            
5178301
(517827)
        

Crank Delrin
43831
71.08%
                     
5178301
(517850)
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561660
(561655)
Base plate 1st series
100
0.16%
     
500001-
500099











Base plate with parallel lettering
10519
16.9%
500100
(5001)
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510520
(510505)

Base plate with parallel lettering & "Type II"
36979
59.97%







510521
(510536)
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547500
(547410)

 
Base plate with parallel lettering & "Type II" - justified
14160
22.96%







         
547500
(547526)
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561660
(561655)
Clearing ring metal
-
-
      
500001
(500002)
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???
      

Clearing ring plastic
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-
      









???
  ---  ---  ---
561660
(561655)
(serial numbers) = known samples
1 CURTA II Service Handbuch - Dismantling & Reassembly - R (1967)
2 Curta Type 2a - Prototype P-004 with 12 X 7 X 16 digits

A lot of mixed versions based on remnants of parts and repairs are known...

Curta Type 2 - Varianten der Kanister • Variations of Curta Type 2 Canisters (A fixed assignment to individual ranges of serial numbers is not possible...)
Curta Type 2 - Varianten der Kurbeln und Löscherringe - Variations of the Cranks and Clearing levers
Compilation of the named and planned calculating machines, prototypes and series models
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