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 Type ll Calculator Serial #528575
Vintage Curta Type ll Calculator Serial #528575
$900.00
Time Remaining: 19h 3m

RARE ! Black CURTA Calculator Type 1 #52465 near MINT !
RARE ! Black CURTA Calculator Type 1 #52465 near MINT !
$990.00
Time Remaining: 27d 7h 11m
Buy It Now for only: $990.00

Rare 1959 CURTA Type II 2 calculator & metal case (#513034) - tested & working
Rare 1959 CURTA Type II 2 calculator & metal case (#513034) - tested & working
$1,350.00
Time Remaining: 29d 13h 52m
Buy It Now for only: $1,350.00

Curta Type I Mechanical Calculator - SN #50304 Works Perfectly
Curta Type I Mechanical Calculator - SN #50304 Works Perfectly
$900.00
Time Remaining: 2d 12h 35m
Buy It Now for only: $900.00

Curta Calculator, GREAT CONDITION No 5073 with Metal Case & Instruction Manual
Curta Calculator, GREAT CONDITION No 5073 with Metal Case & Instruction Manual
$999.00 (1 Bid)
Time Remaining: 2d 20h 4m

THE CURTA CALCULATOR POSTER
THE CURTA CALCULATOR POSTER
$19.95
Time Remaining: 14d 14h 23m
Buy It Now for only: $19.95

RARE CURTA TYPE 1 CALCULATOR in FACTORY NEW COND, NEVER USED w/ case and manuals
RARE CURTA TYPE 1 CALCULATOR in FACTORY NEW COND, NEVER USED w/ case and manuals
$1,599.00
Time Remaining: 28d 19h 2m
Buy It Now for only: $1,599.00

♕♕♕ RARE - LATE CURTA Calculator TYPE II #554135 - VERY GOOD STATE - 1969 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE II #554135 - VERY GOOD STATE - 1969 ♕♕♕
$1,099.00
Time Remaining: 8d 11h 26m
Buy It Now for only: $1,099.00

Curta Calculator, GREAT CONDITION, Type 1 No. 39592
Curta Calculator, GREAT CONDITION, Type 1 No. 39592
$950.00
Time Remaining: 3d 5h 56m

♕♕♕ RARE - Early CURTA Calculator TYPE II #500517 - MINT STATE - 1953 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #500517 - MINT STATE - 1953 ♕♕♕
$1,999.00
Time Remaining: 8d 10h 50m
Buy It Now for only: $1,999.00

Curta calculator Type I, not perfect
Curta calculator Type I, not perfect
$900.00
Time Remaining: 26d 4h 53m
Buy It Now for only: $900.00

♕♕♕ RARE - LATE CURTA Calculator TYPE II #544973 - NEAR MINT STATE - 1968 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE II #544973 - NEAR MINT STATE - 1968 ♕♕♕
$1,199.00
Time Remaining: 12h 46m
Buy It Now for only: $1,199.00

RARE FIND -- LATE CURTA Calculator TYPE II #550063. NEAR MINT  with BOX
RARE FIND -- LATE CURTA Calculator TYPE II #550063. NEAR MINT with BOX
$1,250.00
Time Remaining: 3d 9h 54m
Buy It Now for only: $1,750.00

♕♕♕ RARE - LATE CURTA Calculator TYPE II #549092 - VERY GOOD STATE - 1968 ♕♕♕
♕♕♕ RARE - LATE CURTA Calculator TYPE II #549092 - VERY GOOD STATE - 1968 ♕♕♕
$1,099.00
Time Remaining: 12h 53m
Buy It Now for only: $1,099.00

!! ON SALE !! VERY EARLY CURTA Calculator Type 2 #500236 in near MINT Condition!
!! ON SALE !! VERY EARLY CURTA Calculator Type 2 #500236 in near MINT Condition!
$3,400.00
Time Remaining: 22d 13h 45m
Buy It Now for only: $3,400.00

1969 Curta Type I Calculating Machine Calculator No. 73903 w/ Box
1969 Curta Type I Calculating Machine Calculator No. 73903 w/ Box
$1,499.99
Time Remaining: 17d 23h 51m
Buy It Now for only: $1,499.99

Curta Type 1 Mechanical Calculator
Curta Type 1 Mechanical Calculator
$599.99 (1 Bid)
Time Remaining: 5d 13h 46m

THE CURTA GERMAN CALCULATOR POSTER
THE CURTA GERMAN CALCULATOR POSTER
$19.95
Time Remaining: 27d 12h 8m
Buy It Now for only: $19.95

♕♕♕ RARE - Early CURTA Calculator TYPE II #509721 - VERY GOOD STATE - 1956 ♕♕♕
♕♕♕ RARE - Early CURTA Calculator TYPE II #509721 - VERY GOOD STATE - 1956 ♕♕♕
$1,399.00
Time Remaining: 12h 49m
Buy It Now for only: $1,399.00

Curta Calculator Type 2
Curta Calculator Type 2
$1,825.00
Time Remaining: 21d 22h 31m
Buy It Now for only: $1,825.00

RARE :  EARLY Black CURTA Calculator Type 1 - w/case - MINT !
RARE : EARLY Black CURTA Calculator Type 1 - w/case - MINT !
$999.00
Time Remaining: 6d 13h 3m

CURTA CALCULATOR SERVICE MODEL II MANUAL IN GERMAN
CURTA CALCULATOR SERVICE MODEL II MANUAL IN GERMAN
$19.95
Time Remaining: 23d 23h 37m
Buy It Now for only: $19.95

CURTA II Rechenmaschine Calculator #517049 (I807)
CURTA II Rechenmaschine Calculator #517049 (I807)
$1,550.00
Time Remaining: 28d 19h 57m
Buy It Now for only: $1,550.00

CURTA CALCULATOR SERVICE MODEL  MANUAL IN GERMAN
CURTA CALCULATOR SERVICE MODEL MANUAL IN GERMAN
$19.95
Time Remaining: 18d 18h 3m
Buy It Now for only: $19.95

« Previous12
Permalink