Pyrex 404 Mixing Bowl Yellow Primary Colors 4 Quart 1940's Era(NO Qt or 400 #'s)

Vintage Mixing Bowl
Pyrex
Model 404
Circa 1940's - See Notes Below
Yellow
Primary Colors Pattern
Vibrant Color
Some Scratches
Clean Condition
4 Quart Size*
Measures 10 1/2" Across x 4 1/2"
Estate Find
Thank You For Looking

So I Am Certainly No Expert
But My Research Has Shown
That The Original 1940's Pyrex Pieces
Had No Numbering And No
Pint or Quart Size Designations
The 1950's Pieces
Had Number / Size Designations
But No Pint or Quart Designations
The 1960's - Early 1970's Pieces
Have Both Numbers/Size Designations
And Pint and Quart Designations
Around 1975, The Pieces Started
To Have Metric Designations
I Hope This Information Assist
You In Your Collecting Endeavors