Curta Type 1 - Varianten • Variations of Curta Type I

1947 ---------------------------------------- 19517
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
---
1970

Total 78730 units


Proto-types
901
(912)
---
---
---
---
---
---
---
---
---
---
---
---
---
---
80427
(80404)
---

901-9996
(912-978)
   













7100
8.93%
 
901-9996
(912-978)
1900
(1904)
---
9000
(8998)












~1300
 1.65%
 
901-9996
(912-978)
---
(2204)
(2591)













~50
0.063%
 
(1978)
(2023)














~2530
3.21%
 
901-9996
(912-978)
---
(3438)













70205
88.28%


    9001
(9021)
---
---
---
---
---
---
---
---
---
---
---
80427
(80404)
2320
2.29%


      137509 -17260










6576
8.27%
 
901
(912)
---
---
71781|
9321-9620












Setting knobs rectangular 72949
91.73%




7179-9320
|9621
--- --- --- --- --- --- --- --- --- --- --- 80427
(80404)
Crank metal without arrow
31149
39.17%

901
(912)
---
---
---
---
---
---
---
32060
(32051)
         


Crank metal with arrow
14840
18.66%
                 
32060
(32093)
---
---
---
---
468903
(46883)


Crank complete Delrin
33538
42.17%
                           
468904
(46902)
---
80427
(80404)
Base plate with round lettering
6600
8.30%

901
(912)
---
---
75208
(7432)












Base plate with curved lettering
69585
87.50%




7521
(7549)
---
---
---
---
---
38000
(37996)
41100
(41109)
---
---
---
80185
(80151)
Base plate with curved lettering | large serial number
247
0.31%


                           
(80186)
(80404)
Base plate with parallel lettering
1000
1.26%
38000
(38038)
39000
(38948)
Base plate with parallel lettering & "Type I"
2100
2.64%










39000
(39037)
41100
(41073)




Four reversing lever arrows 26700
33.57%

901
(912)
---
---
---
---
---
27600
(27552)









Two reversing lever arrows 52827
66.43%







27600
(27713)
---
---
---
---
---
---
---
---
80427
(80404)
Clearing ring metal, screw
17769
22.57%

901
(912)
---
---
---
161465
(16062)











Clearing ring metal, rivet
-
-
         
16147
(16329)
---
---
---
---
---
---
---
---
???


Clearing ring plastic
-
-
                           
???
---
???
Crank handle old type
17769
22.57%

901
(912)
---
---
---
186702











Crank handle new type
28220
35.84%
         
18671
---
---
---
---
---
---
---
---
468903
(46883)


(serial numbers) = known samples
1 CURTA I Service Manual - Dismantling Stage E1-a (1953) - Group I - Group II
2 CURTA I Service Manual - Dismantling Stage E3-c (1961) - Group IV - Group V - Group VI
3 CURTA I Service Manual - Dismantling Stage E3-c (1961) - Group IV - Group V - Group VI
4 CURTA I Service Handbuch - Dismantling & Reassembly - 1-E (1967)
5 CURTA I Service Manual - Dismantling Stage E2-a (1953) - Group III - Group IV
6 In the beginning, not all serial numbers are representing produced Curtas - about 900 Curtas were never produced.
7 The production figures for the first five years cannot be precisely allocated.
8 Also the changeover to the new Zero positioning unit
9 Two ranges: numbers 13750 - 15860 and 17050 - 17260
A detailed description of the changes can be found in the Service Manual (Servicehandbuch)
A lot of mixed versions based on remnants of parts and repairs are known...
Curta Type 1 - Varianten der Kanister • Variations of Curta Type 1 Canisters (A fixed assignment to individual ranges of serial numbers is not possible...)
Curta Type 1 - 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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