Z7069 OTIS KING Kings Pocket Cylndrical Calculator Scale Box

Review OTIS KING Kings Pocket Cylndrical Calculator Scale No. 429/430 Case Box

The Otis Kelly Z7069 Kings Pocket Cylindrical Calculator Scale, model numbers 429 and 430, is a rare and intriguing mathematical instrument that combines the functions of a calculator and a balance scale in a compact, portable design. This antique calculator, manufactured by the Otis Kelly Company around the late 19th or early 20th century, is an excellent addition to any collection of historical mathematical devices or for those with an interest in the evolution of calculating tools.

The Kings Pocket Cylindrical Calculator Scale is housed in a solid, wooden box, measuring approximately 6 inches long, 3 inches wide, and 1 inch thick. The exterior of the box is adorned with intricate, gold-foil embossing, displaying the Otis Kelly Company logo and the title "Kings Pocket Cylindrical Calculator Scale." The lid of the box opens to reveal a velvet-lined compartment, designed to protect the delicate calculator when in storage or transport.

Once removed from its protective casing, the calculator itself is a marvel of engineering. The cylindrical design is approximately 3 inches in length and features a brass base with a polished, black enameled surface. The calculator is comprised of a series of interconnected gears and dials that allow for the calculation of sums, differences, products, and quotients. The calculations are performed by turning the various dials, which in turn, move the pointers on the scale to reflect the results.

The scale component of the calculator is located at the top of the device and consists of two balanced arms, each with a pointer that moves along a graduated scale. The arms can be set with weights, and the calculator can be used to determine the difference in weight between two objects. This feature makes the Kings Pocket Cylindrical Calculator Scale a versatile tool for both mathematical and practical applications.

The Otis Kelly Z7069 Kings Pocket Cylindrical Calculator Scale is in excellent condition, considering its age. The brass components have a rich patina, adding to its antique charm, while the enamel and gears show minimal signs of wear. The wooden box is also in good condition, with only minor scuffs and scratches.

In conclusion, the Otis Kelly Z7069 Kings Pocket Cylindrical Calculator Scale, model numbers 429 and 430, is an exceptional piece of mathematical history. This calculator represents a unique blend of design, engineering, and functionality, making it a prized possession for any collector or enthusiast of historical calculating tools.

Pros and Cons of buying a Otis King Z7069 Pocket Calculator Scale (Model 429/430)

The Otis King Z7069 Pocket Calculator Scale (Model 429/430) is a unique and compact device that combines a calculator and a scale in one. Here are some potential advantages and disadvantages of purchasing this gadget:

1. Versatility: With the ability to perform both calculation tasks and weight measurements, this device offers a 2-in-1 functionality that can save you the need to carry and manage multiple devices.

2. Portability: Its compact size and lightweight design make it an ideal gadget for individuals who frequently travel or require a convenient solution for both calculating and weighing tasks on the go.

3. Durability: Otis King products are known for their high-quality construction and long-lasting performance, ensuring that you get a device that can stand up to daily use.

4. Precision: Both the calculator and the scale offer high levels of accuracy, which is crucial for various industries and applications, such as finance, engineering, and science.

1. Limited features: While the pocket calculator scale offers multiple functions, it may not include advanced features available on dedicated calculators or scales.

2. Complexity: Combining two functions into one may make the device slightly more complex and challenging to use for some individuals, especially those who are not familiar with both calculators and scales.

3. Price: The Otis King Z7069 pocket calculator scale may be more expensive than a standard calculator or scale due to its dual functionality.

4. Limited capacity: Depending on the specific model, the pocket calculator scale may not be suitable for weighing larger items or performing complex calculations that require extensive memory or processing power.

The Otis King Z7069 Pocket Calculator Scale (Model 429/430) offers a unique and convenient solution for individuals who need to perform both calculation and weight measurement tasks on the go. Its versatility, portability, durability, and precision make it an attractive option for professionals and enthusiasts alike. However, its limited features, complexity, price, and capacity may be considerations for some potential buyers. Ultimately, the decision to purchase this device depends on your specific needs, preferences, and budget. If you can benefit from the 2-in-1 functionality and the device fits your requirements, the Otis King pocket calculator scale may be an excellent investment.

Details:

This particular slide rule is in excellent condition and comes with the case really, its a box. The Otis Kings pocket cylindrical calculator scale no. 429/430 Z7069 is a slide rule from the united Kingdom. The compact design and included case make it convenient for carrying using on-the-go, adding to its practicality everyday tasks.

Known for its durability and accuracy, this calculator is a sought-after collectible vintage electronics enthusiasts.

specifications vintcalc:

• brand: Otis King
• mpn: Z7069
• model: Otis Kings 429/430 Z7069
• part type: Pocket Scale Calculator Box Case
• country of origin: United Kingdom
• vintage: Yes

payments vintcalc:

• other
• credit card: visa
• wallet: google-pay

seller vintcalc:

• # reviews: 512
• rating: 100.0%
• city: denair, california

general vintcalc:

• category: Electronics > Vintage Calculators

offer vintcalc:

• sold #: 11
• started: october 19, 2025
• availability: in stock
• options: ship-to-home
• quantity: 1

shipping vintcalc:

• class: standard
• service: usps ground advantage
• carrier: usps
• transit: 5-11 days
• type: fixed

returns vintcalc:

• policy: no returns