Item description for Vintage Pyrex Primary Colors Blue Mixing Bowl 401 No 1.5 Pt Size Markings 1950's

Vintage Mixing Bowl

Pyrex

Primary Colors Collection

Blue

Size 401

Circa 1950's Bowl

No Size Designation

See Below For Dating of Pyrex Bowls

1.5 Pint Size

Good Condition

Shows Wear and Scratches

See Pictures

5-3/4" Across x 3-1/2" Tall

Thank You For Looking

So I Am Certainly No Expert

But My Research Has Shown

That The Original 1940's Bowls

Had No Numbering And No

Pint or Quart Size Designations

The 1950's Bowls

Had 400's Size Designation

But No Pint or Quart Designations

The 1960's - Early 1970's Bowls

Have Both 400's Size Designation

And Pint and Quart Designations

Around 1975, The Bowls Started

To Have Metric Designations

I Hope This Information Assist

You In Your Collecting Endeavors