Dating benrus watches
Supplies of high quality Swiss movements were not only readily available, but were also inexpensive for Benrus to buy.
This was due to high volume and a strong relationship with the Swiss cartel.
But in the early 1900's watch manufacturers and jewelers were soldering solid lugs to small pocketwatches, adding straps, and wearing them on the wrist. The wristwatch gained very quickly in popularity, to the point that by the early 1920's worldwide pocketwatch manufacture and sales were on the decline.
Founded in New York City in 1921 by three brothers - Oscar (d.1990), Benjamin, and Ralph (d.1960). The name "BENRUS" was a combination of Benjamin Lazrus first and last names. Since it's invention in the 16th centurey the only choice in watches was the pocketwatch.
Most vintage Swiss pocket watches did NOT have serial numbers and can't be dated by this method.When the war was over, some other family members would join the company.Jay Kay Lazrus and Julian Lazrus were Oscar Lazrus' sons.Most US companies (including watch companies) were brought into the war effort to produce items for military use. Indeed, Benrus was manufacturing items toward the War effort.They had top secret government contracts to manufacture timing devices for use in bombs and weapons.