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Unraveling the History and Value of Allied Signal Stock Certificates: A Collector’s Guide

Unraveling the History and Value of Allied Signal Stock Certificates: A Collector’s Guide

As a collector of historical stock certificates, one company that may have piqued your interest is Allied Signal. The company’s storied past, diverse ventures, and eventual merger with Honeywell make it an intriguing piece of business ephemera. In this comprehensive guide, we will delve into the history of Allied Signal, the value and rarity of its stock certificates, and tips for collecting these fascinating pieces of financial history.

A Brief History of Allied Signal

Allied Signal was an American aerospace, automotive, and engineering conglomerate that can trace its roots back to the late 1800s. Its history is a tale of multiple mergers, acquisitions, and divestments, resulting in a highly diversified company.

The Amalgamation of Allied Chemical and Signal Companies

Allied Signal came to be in 1985 after the merger of Allied Chemical and Signal Companies. To understand its history, one must first look at these two separate entities.

Allied Chemical

Allied Chemical began in 1920 as Allied Chemical & Dye Corporation. It was the result of a merger between five American chemical companies interested in producing chemicals and dyes for various industries. The company grew over the years by acquiring smaller chemical companies and diversifying its portfolio. In 1958, the company changed its name to simply Allied Chemical, with operations in chemicals, plastics, and fibers.

Signal Companies

Signal Companies started in 1928 as the Signal Gasoline Company, focusing on oil and gas reserves in California. Expanding into oil exploration, production, and refining, the company eventually became Signal Oil & Gas Company in 1941. Over the years, Signal Companies continued to grow through acquisitions, diversifying into aerospace and automotive technologies as well.

Major Acquisitions and the Formation of Allied Signal

In 1985, the two companies merged to form Allied-Signal, later shortening the name to Allied Signal. The resulting company had a diverse portfolio, with operations in automotive, aerospace, chemicals, and electronics. Notable acquisitions in the 1990s include the automotive parts manufacturer Bendix Corporation and the aerospace manufacturer Garrett AiResearch.

The Merger with Honeywell and the End of Allied Signal

In 1999, Allied Signal announced a merger with Honeywell, another major player in the aerospace and industrial sectors. In 2000, the newly merged company chose the Honeywell name, marking the end of Allied Signal as a distinct corporate entity. However, Honeywell still maintains many of the acquired businesses and technologies, making it a relevant point of interest for stock certificate collectors.

Collecting Allied Signal Stock Certificates

Stock certificates from Allied Signal, Allied Chemical, Signal Companies, and their various mergers and acquisitions are popular with collectors due to their historical significance and diverse designs. These documents often feature intricate artwork, corporate seals, and typography that reveal the aesthetic trends and financial history of the time.

Determining the Value and Rarity of Stock Certificates

The value of a stock certificate depends on multiple factors, including age, rarity, historical significance, and condition. In general, older and rarer certificates in excellent condition fetch higher prices. Collectors may also be interested in certificates with unique features or those tied to significant corporate events or famous individuals.

While Allied Signal stock certificates are not exceptionally rare, they have a dedicated following among certain collectors. Collectors specializing in American corporate history, aerospace, automotive, or chemical companies may be particularly drawn to these pieces.

Tips for Collecting and Preserving Stock Certificates

For collectors new to stock certificates, here are some tips to help you build and maintain a valuable collection:

  • Educate yourself: Learn about the history of the companies and industries you’re interested in. Knowledge of corporate events, mergers, and acquisitions can help you identify valuable or rare certificates.
  • Condition matters: As with any collectible, a certificate’s condition plays a significant role in determining its value. Look for certificates without tears, stains, or other damage.
  • Storage is key: Store your certificates in acid-free, archival-safe materials to prevent decay and damage. Keep them in a cool, dry place away from direct sunlight.
  • Engage with the community: Join collector forums, attend shows or auctions, and network with other enthusiasts. You can gain invaluable knowledge, buying and selling opportunities, and make new friends who share your passion.


Allied Signal stock certificates tell the captivating story of a diversified American conglomerate with roots in the chemical, automotive, and aerospace industries. Collecting these certificates offers a window into the mergers, acquisitions, and divestments that shaped the company’s history. By understanding the factors that determine value and rarity and employing strategies for collecting and preserving stock certificates, you can build a collection that both honors the past and serves as an investment in the future.


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