CITIZEN & SHARP & CASIO - Calculator (4) - 1980-1990, 1990-2000 - Credit Card & Scientific

This carefully curated set consists of four Japanese electronic calculators representing two distinct eras of personal computing innovation in Japan: the ultra-slim digital miniaturization boom of the late Showa to early Heisei period (昭和末期〜平成初期 / circa late 1980s–early 1990s), and the highly functional scientific calculator evolution of the Heisei period (平成 / circa 2000s–2010s).

Together, these four pieces form a compact yet historically meaningful collection illustrating the transition from pocket electronic organizers to advanced educational scientific calculators.

The first two items are credit card–style calculators:
CITIZEN MC-300 Credit Card Calculator with Electronic Telephone Directory
A refined and minimalistic device combining a 10-digit calculator with an alphanumeric phone directory. It features name/number storage, recall and sorting functions, and compact low-power circuitry typical of late-20th-century Japanese precision engineering. This model represents CITIZEN’s expansion from watchmaking into compact electronics.

SHARP PA-160 TEL & SCHEDULE Calculator
A visually distinctive card-format device integrating calculator, telephone directory, and scheduling functions. With bold graphic layout and segmented key design, it reflects SHARP’s characteristic emphasis on usability and interface clarity during the same technological period.

The third and fourth items represent the next stage of calculator development:
CASIO fx-370ES Scientific Calculator (Natural Display)
A mid-2000s to early-2010s Heisei era educational scientific calculator featuring CASIO’s “Natural Display,” allowing textbook-style mathematical input and output. It includes advanced scientific functions such as statistics, complex numbers, trigonometry, and engineering notation. Basic power-on and calculation functions have been confirmed.

CASIO fx-82ES Scientific Calculator (Natural Display)
A closely related model widely used in schools worldwide. Known for reliability and intuitive layout, it represents one of CASIO’s most influential global education models of the Heisei period (平成 / approx. 2004–2012). Basic display and key response have been tested and confirmed.

Presented together, these four calculators illustrate two complementary philosophies:

• Ultra-thin information tools of the late 20th century
• Full-featured educational scientific instruments of the early 21st century

This makes the set particularly appealing for collectors of Japanese vintage electronics, industrial design enthusiasts, educational history researchers, or as a compact study collection demonstrating the evolution of personal digital calculation devices.

Please note: lithium batteries are not included, in accordance with international postal regulations.

Manufacturer Information
CITIZEN – Internationally renowned for precision watchmaking and quartz technology. In the late 20th century, the company expanded into compact electronic devices, applying its expertise in miniaturization and low-power circuitry.

SHARP – A pioneering Japanese electronics manufacturer with a central role in the global development of calculators and portable information devices.

CASIO – One of the world’s leading calculator manufacturers, instrumental in popularizing both early digital calculators and modern educational scientific models worldwide.

Size
CITIZEN MC-300: approx. 85.5 × 54 × 4 mm, weight approx. 18 g
SHARP PA-160: approx. 85 × 55 × 4 mm, weight approx. 33 g
CASIO fx-370ES: approx. 16 × 8 × 1 cm, 148 g
CASIO fx-82ES: approx. 16 × 8 × 1 cm, 148g
(Credit card–size ultra-slim format + full-size scientific calculator)

Condition: (Please refer to the photos for details)
- This is a vintage / pre-owned item.
- Due to age and previous use, there may be signs of wear such as scratches, stains, discoloration, or creases.
- Please note that vintage items may have a distinctive smell due to long-term storage or materials used.
Sensitivity to such odors may vary from person to person and from country to country.
- We try to describe the condition as accurately as possible, but perceptions may differ depending on individual standards.
- Colors may appear slightly different depending on your monitor or lighting when the photos were taken.
- Please purchase only if you understand and appreciate the unique characteristics of vintage items.

Shipping
The lot will be carefully packaged and sent by mainly Japan Post or DHL depend on the situation.
It will be shipped from Japan, so it takes about 2-3 weeks to receive normally.

Please understand that we use recycled materials (cardboard, old newspapers, etc.)
as much as possible for packaging materials in order to protect the environment.

Import duties, taxes, and charges are not included in the item price or shipping cost.
These charges are the buyer's responsibility.

Sometimes Customs or delivery company in your country contact you for Customs clearance via phone or email.
Please make sure that you could answer their contact.
If you don't, the parcel will be returned to us and it cost more double shipping fee for reshipping.

Thank you for your cooperation.