# About Curta Calculators

**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:**

♕♕♕ CURTA Calculator TYPE II #529408 - VERY GOOD CONDITION ♕♕♕$935.00 Time Remaining: 15h 15m |
THE CURTA CALCULATOR POSTER$19.95 Time Remaining: 19d 15h 49m Buy It Now for only: $19.95 |
Working 1957 Curta Calculator Type II With Metal Can & Instructions !! Nice !!$2,000.00 Time Remaining: 7d 22h 27m Buy It Now for only: $2,000.00 |

VERY RARE AND EXCEPTIONAL C.1952 Curta Type 1 Calculator #19598 W/ Original Case$1,200.00 Time Remaining: 17d 10h 5m Buy It Now for only: $1,200.00 |
Fantastic early mechanical Type I CURTA CALCULATOR with instructions, 1968$761.01 (20 Bids) Time Remaining: 21h 48m |
Curta Calculator Type II$1,199.99 Time Remaining: 8d 15h 38m Buy It Now for only: $1,199.99 |

EXCEPTIONAL Curta Type 1 Calculator Mint Condition 66816$2,995.00 Time Remaining: 21d 21h 40m Buy It Now for only: $2,995.00 |
CURTA TYPE 1 CALCULATOR #72867-CONTINA AG MAUREN-WORKS GREAT-Case melted some$650.00 Time Remaining: 2d 18h |
CURTA Type 1 # 28218 Calculator by Contina AG Muren System Curt Herzstark w Case$1,000.00 Time Remaining: 1d 20h 32m Buy It Now for only: $1,300.00 |

Curta Calculator Patents Full-Image on CD-ROM$19.95 Time Remaining: 8d 13h 11m Buy It Now for only: $19.95 |
Vintage C.1954 Curta Type 1 Calculator w/ Case$1,399.00 Time Remaining: 25d 13h 1m Buy It Now for only: $1,399.00 |
CURTA TYPE II CALCULATOR in NEAR MINT STATE, #528951 w/ metal can and 2 manuals$1,495.00 Time Remaining: 22h 45m Buy It Now for only: $1,495.00 |

RARE EARLY 1954 ALL BLACK CURTA Type II Calculator, Low #504405 -w/can+2 manuals$1,695.00 Time Remaining: 3d 22h 16m Buy It Now for only: $1,695.00 |
♕♕♕ RARE - BOXED CURTA Calculator TYPE I #49750 - VERY GOOD Cond - 1962 ♕♕♕$1,299.00 Time Remaining: 13d 8h 19m Buy It Now for only: $1,299.00 |
c.1957 Vintage Type 1 Curta Calculator in Original Canister - No.37361$1,157.91 Time Remaining: 22d 7h 27m Buy It Now for only: $1,157.91 |

VERY RARE AND EXCEPTIONAL C.1954 Curta Type 1 Calculator #27713 W/ Original Case$1,199.99 Time Remaining: 5d 8h 11m Buy It Now for only: $1,199.99 |
♕♕♕ RARE - BOXED CURTA Calculator TYPE I #68569 - VERY GOOD Cond - 1967 ♕♕♕$1,299.00 Time Remaining: 13d 8h 25m Buy It Now for only: $1,299.00 |
♕♕♕ RARE - Leather Case Canister CURTA Calculator TYPE I - VERY GOOD STATE ♕♕♕$199.00 Time Remaining: 28d 5h 6m Buy It Now for only: $199.00 |

♕♕♕ RARE - Early CURTA Calculator TYPE II #505009 - VERY GOOD STATE - 1954 ♕♕♕$1,299.00 Time Remaining: 21d 10h 25m Buy It Now for only: $1,299.00 |
RARE - Sticker CURTA Calculator TYPE I or TYPE II CANISTER - Case - Autocollant$24.99 Time Remaining: 4d 7h 9m Buy It Now for only: $24.99 |
Curta TYPE I Calculator$999.00 Time Remaining: 21d 18h 5m Buy It Now for only: $999.00 |

RARE - O-ring for CURTA Calculator TYPE I or TYPE II - Joint Dichtungsring Oring$14.99 Time Remaining: 17d 13h 41m Buy It Now for only: $14.99 |
CURTA Type 1 Calculator Made in Liechtenstein$2,440.00 Time Remaining: 13d 7h 25m Buy It Now for only: $2,440.00 |
CURTA Type 2 Calculator Made in Liechtenstein$2,870.00 Time Remaining: 13d 7h 23m Buy It Now for only: $2,870.00 |