Bert Berkley, Tension Corporation @NPM

Bert Berkley, Tension Corporation @NPM

Uploaded July 2021 | Updated September 2026, 6 days ago

Bert Berkley, Tension Corporation
America’s Mailing Industry virtual exhibition:
https://postalmuseum.si.edu/exhibition/america’s-mailing-industry

Bert Berkley, Tension Corporation

SLE (Servo large envelope) machine - Western States Envelope & Label

Mullen Family

Polo Grounds

Ed Bolden

Bill Miller, The Washington Missourian

Data-Mail, Inc. - The Beginning

Uniform Beret

The Nebraska Signal footage, c. 1941

Lester Wunderman, Creator of Modern-Day Direct Marketing (part 3/3)

Fairrington

SW (Servo Rotamatic) - Western States Envelope & Label

SmithsonianNPM |

Bert Berkley, Tension Corporation