About Curta Calculators

A Curta Calculator

A Curta Calculator

What is a Curta Calculator?

A Curta Calculator is a hand-cranked mechanical calculator that fits in the palm of your hand. It was originally sold in 1948 and performs addition, subtraction, multiplication & division operations, With some skill, it is even possible to compute advanced mathematics such as square roots and other operations.

What's amazing about a Curta Calculator is that the entire device operates completely on mechanical power without any electricity to accurately compute an equation. The Curta Calculator utilizes a symphony of gears, sliders & drums to find the solution. Considering it predated most computers, the Curta Calculator is an amazing piece of collectible period engineering.

For a demonstration of the operation of a Curta Calculator, we suggest you check out this video.

Curta Calculators were made in two distinct models: Type 1 and Type 2.

  • Type 1 Curta Calculators are the smaller of the two models and are made of either plastic or metal. Type 1 Curta Calculator models have 8 input registers, a 6 digit crank turn register, and an 11 digit result register. They weigh approximately 8 ounces and were originally sold with a plastic or metal carrying case.
  • Type 2 Curta Calculators are the larger of the two models and are made of either plastic or metal. Type 2 Curta Calculator models have 11 input registers, a 8 digit crank turn register, and an 15 digit result register. They weigh approximately 12 ounces and were originally sold with a plastic or metal carrying case.

Generally, earlier models featured more metal parts than their later counterparts.

Since their introduction, an estimated 140,000 Curta Calculators were made and sold until the early 1970s, when electronic calculators became available. Fortunately, it's still possible to purchase a vintage Curta calculator today. Where? Why the internet of course!

Here are current Curta Calculator listings on eBay:

Vintage Curta Calculator Type 1 #21435 With Canister and Manual
Vintage Curta Calculator Type 1 #21435 With Canister and Manual
$800.00 (1 Bid)
Time Remaining: 10h 10m

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 14h 35m
Buy It Now for only: $19.95

Curta Calculator 1958, canister - perfect condition
Curta Calculator 1958, canister - perfect condition
$900.00 (1 Bid)
Time Remaining: 11h 17m

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$19.95
Time Remaining: 19d 11h 57m
Buy It Now for only: $19.95

CURTA TYPE II CALCULATOR #522844 w/ metal can and 2 manuals
CURTA TYPE II CALCULATOR #522844 w/ metal can and 2 manuals
$1,849.00
Time Remaining: 19d 17h 31m
Buy It Now for only: $1,849.00

CURTA CALCULATOR - 1966 ORIGINAL AD
CURTA CALCULATOR - 1966 ORIGINAL AD
$12.95
Time Remaining: 12d 21h 24m
Buy It Now for only: $12.95

rare 1959 all  metal Curta Type II Calculator Low sn 513274 w/ can and 2 manuals
rare 1959 all metal Curta Type II Calculator Low sn 513274 w/ can and 2 manuals
$1,495.00
Time Remaining: 2d 12h 4m
Buy It Now for only: $1,495.00

VERY RARE AND EXCEPTIONAL C.1954 Curta Type 1 Calculator #27713 W/ Original Case
VERY RARE AND EXCEPTIONAL C.1954 Curta Type 1 Calculator #27713 W/ Original Case
$1,399.99
Time Remaining: 16d 6h 57m
Buy It Now for only: $1,399.99

CURTA calculator TYPE II RARE BLACK 1953 #502218 w/ Metal case and Manual
CURTA calculator TYPE II RARE BLACK 1953 #502218 w/ Metal case and Manual
$1,280.00
Time Remaining: 6d 6h 48m
Buy It Now for only: $1,280.00

♕♕♕ RARE - Early CURTA Calculator TYPE II #506874 - GOOD STATE - 1955 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #506874 - GOOD STATE - 1955 ♕♕♕
$1,299.00
Time Remaining: 12d 15h 59m
Buy It Now for only: $1,299.00

♕♕♕ RARE - CURTA Calculator TYPE II #525839 - VERY GOOD STATE - 1963 ♕♕♕ PRIME
♕♕♕ RARE - CURTA Calculator TYPE II #525839 - VERY GOOD STATE - 1963 ♕♕♕ PRIME
$1,199.00
Time Remaining: 3d 7h 27m
Buy It Now for only: $1,199.00

RARE - CURTA Calculator TYPE I Metallic CLEARING LEVER
RARE - CURTA Calculator TYPE I Metallic CLEARING LEVER
$59.99
Time Remaining: 17d 7h 16m
Buy It Now for only: $59.99

♕♕♕ RARE - BOXED CURTA Calculator TYPE II #549649 - VERY GOOD CD 1969 PRIME ♕♕♕
♕♕♕ RARE - BOXED CURTA Calculator TYPE II #549649 - VERY GOOD CD 1969 PRIME ♕♕♕
$1,399.00
Time Remaining: 3d 8h 45m
Buy It Now for only: $1,399.00

Curta Calculator Type 1 #42959
Curta Calculator Type 1 #42959
$425.00 (3 Bids)
Time Remaining: 19h 54m

CURTA Type 2 Calculator Made in Liechtenstein
CURTA Type 2 Calculator Made in Liechtenstein
$2,870.00
Time Remaining: 24d 6h 9m
Buy It Now for only: $2,870.00

CURTA calculator TYPE I 1969 #76580 w/ Metal case Great Condition
CURTA calculator TYPE I 1969 #76580 w/ Metal case Great Condition
$980.00
Time Remaining: 2d 12h 8m
Buy It Now for only: $1,300.00

♕♕♕ RARE - Leather Case Canister CURTA Calculator TYPE I - VERY GOOD STATE ♕♕♕
♕♕♕ RARE - Leather Case Canister CURTA Calculator TYPE I - VERY GOOD STATE ♕♕♕
$199.00
Time Remaining: 9d 3h 52m
Buy It Now for only: $199.00

CURTA Type 1 Calculator Made in Liechtenstein
CURTA Type 1 Calculator Made in Liechtenstein
$2,440.00
Time Remaining: 24d 6h 10m
Buy It Now for only: $2,440.00

♕♕♕ RARE - BOXED CURTA Calculator TYPE II #554901 - VERY GOOD Cond - 1969 ♕♕♕
♕♕♕ RARE - BOXED CURTA Calculator TYPE II #554901 - VERY GOOD Cond - 1969 ♕♕♕
$1,399.00
Time Remaining: 2d 9h 38m
Buy It Now for only: $1,399.00

♕♕♕ RARE - CURTA Calculator TYPE I #54798 - VERY GOOD STATE - 1963 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #54798 - VERY GOOD STATE - 1963 ♕♕♕
$1,099.00
Time Remaining: 3d 7h 8m
Buy It Now for only: $1,099.00

RARE - O-ring for CURTA Calculator TYPE I or TYPE II - Joint Dichtungsring Oring
RARE - O-ring for CURTA Calculator TYPE I or TYPE II - Joint Dichtungsring Oring
$14.99
Time Remaining: 28d 12h 27m
Buy It Now for only: $14.99

♕♕♕ RARE - Early CURTA Calculator TYPE II #509561 - VERY GOOD STATE - 1956 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #509561 - VERY GOOD STATE - 1956 ♕♕♕
$1,299.00
Time Remaining: 3d 7h 16m
Buy It Now for only: $1,299.00

RARE CURTA Calculator TYPE II № 515184 Lichtenstein By Contina Ltd Mauren 1960
RARE CURTA Calculator TYPE II № 515184 Lichtenstein By Contina Ltd Mauren 1960
$1,288.00
Time Remaining: 20d 11h 49m
Buy It Now for only: $1,288.00

RARE - CURTA Calculator TYPE I or II Plastic CLEARING LEVER
RARE - CURTA Calculator TYPE I or II Plastic CLEARING LEVER
$59.99
Time Remaining: 20d 4h 19m
Buy It Now for only: $59.99

« Previous12
Permalink