These beaker flasks are from an estate sale. The owner is a retired detective that did his own photography.
Both beakers are Pyrex 500 ml
Made in USA
One beaker is clear glass, no volume scale, thinner glass, marked 500 ml, PYREX trademark, made in USA, solid white circle
Other flask has graduated volume marks, 100 ml to 500 ml, PYREX USA, no. 4980, stopper No.7, thicker glass with rolled rim, solid white oval
Both measure 7" H, 1 1/2" mouth, 4" base
Excellent Condition