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:

1955 CURTA Type I CALCULATOR  Perfect Condition
1955 CURTA Type I CALCULATOR Perfect Condition
$1,150.00
Time Remaining: 1d 2h 33m

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 11d 3h 39m
Buy It Now for only: $19.95

CURTA-Instructions for use of the Curta Calculator (booklet in english language)
CURTA-Instructions for use of the Curta Calculator (booklet in english language)
$19.00
Time Remaining: 5d 6h 43m
Buy It Now for only: $19.00

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 24d 1h 24m
Buy It Now for only: $19.95

CURTA Calculator TYPE I , May 1955, Excellent
CURTA Calculator TYPE I , May 1955, Excellent
$400.00 (32 Bids)
Time Remaining: 1d 14h 37m

♕♕♕ RARE - CURTA Calculator TYPE I #15255 - GOOD STATE - 1951 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #15255 - GOOD STATE - 1951 ♕♕♕
$999.00
Time Remaining: 2d 3h 22m
Buy It Now for only: $999.00

RARE - LATE CURTA Calculator - Type I MINT CONDITION  w/Case Papers #77607 1969
RARE - LATE CURTA Calculator - Type I MINT CONDITION w/Case Papers #77607 1969
$1,170.00
Time Remaining: 11d 7h 16m
Buy It Now for only: $1,170.00

scarce Experimental CURTA Type I Calculator Full Set
scarce Experimental CURTA Type I Calculator Full Set "The Silent Curta"
$718.00 (23 Bids)
Time Remaining: 1d 15h 9m
Buy It Now for only: $1,480.00

CURTA-Computing examples for the Curta Calculator (booklet in english language)
CURTA-Computing examples for the Curta Calculator (booklet in english language)
$19.00
Time Remaining: 22d 7h 25m
Buy It Now for only: $19.00

♕♕♕ RARE - CURTA Calculator TYPE I #25194 - GOOD STATE - 1954 ♕♕♕
♕♕♕ RARE - CURTA Calculator TYPE I #25194 - GOOD STATE - 1954 ♕♕♕
$999.00
Time Remaining: 22d 5h
Buy It Now for only: $999.00

CURTA Calculator TYPE II #521619 - Excellent condition - ~1962, Metal Case
CURTA Calculator TYPE II #521619 - Excellent condition - ~1962, Metal Case
$525.00
Time Remaining: 3d 6h 18m

RARE EARLY 1956 CURTA Type I CALCULATOR in PERFECT WORKING COND.  AS BEING NEW
RARE EARLY 1956 CURTA Type I CALCULATOR in PERFECT WORKING COND. AS BEING NEW
$1,695.00
Time Remaining: 13d 1h 29m
Buy It Now for only: $1,695.00

Curta Calculator Patents Full-Image on CD-ROM
Curta Calculator Patents Full-Image on CD-ROM
$18.95
Time Remaining: 5h 33m
Buy It Now for only: $18.95

Curta Type II Black Mechanical Calculator #542309 w/ Case,Manual
Curta Type II Black Mechanical Calculator #542309 w/ Case,Manual
$600.00 (1 Bid)
Time Remaining: 3d 9h 28m

♕♕♕ RARE - LATE CURTA Calculator TYPE II #556263 - Near MINT STATE - 1970 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE II #556263 - Near MINT STATE - 1970 ♕♕♕
$1,399.00
Time Remaining: 10d 22h 50m
Buy It Now for only: $1,399.00

CURTA TYPE I Calculator COMPLETE SET prime #78887 w/ box,case,manuals NEVER USED
CURTA TYPE I Calculator COMPLETE SET prime #78887 w/ box,case,manuals NEVER USED
$1,795.00
Time Remaining: 18d 5h 34m
Buy It Now for only: $1,795.00

Curta Type II Mechanical Calculator
Curta Type II Mechanical Calculator
$599.00 (3 Bids)
Time Remaining: 3d 13h 57m

♕♕♕ UNIQUE !!! RARE - Wooden Box for CURTA Calculators TYPE II - GOOD STATE ♕♕♕
♕♕♕ UNIQUE !!! RARE - Wooden Box for CURTA Calculators TYPE II - GOOD STATE ♕♕♕
$799.00
Time Remaining: 21d 4h 3m
Buy It Now for only: $799.00

1969 Late CURTA Calculator Type I #71474 - Excellent Condition w/Can
1969 Late CURTA Calculator Type I #71474 - Excellent Condition w/Can
$1,595.00
Time Remaining: 20d 10h 13m
Buy It Now for only: $1,595.00

Curta Type 2 Calculator
Curta Type 2 Calculator
$800.00 (1 Bid)
Time Remaining: 4d 1h 6m

Curta Calculator Type II. Made in Liechtenstein by Contina LTD Mauren
Curta Calculator Type II. Made in Liechtenstein by Contina LTD Mauren
$1,399.00
Time Remaining: 16d 11h 35m
Buy It Now for only: $1,399.00

♕♕♕ RARE - Early CURTA Calculator TYPE II #514414 - MINT STATE - 1960 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #514414 - MINT STATE - 1960 ♕♕♕
$3,999.00
Time Remaining: 14d 23h 34m
Buy It Now for only: $3,999.00

♕ RARE - CURTA Calculator TYPE II #517050- EXCELLENT/W Case- 1961 ♕
♕ RARE - CURTA Calculator TYPE II #517050- EXCELLENT/W Case- 1961 ♕
$510.00 (2 Bids)
Time Remaining: 4d 5h 38m

Vinatge 1951 Curta Type I Calculator No. 15062 - MINT w/ Original Box and Manual
Vinatge 1951 Curta Type I Calculator No. 15062 - MINT w/ Original Box and Manual
$1,999.99
Time Remaining: 6d 9h 31m
Buy It Now for only: $1,999.99

« Previous12
Permalink