Possibly from a flat sided jug? Doesn't seem like industrial waste. Clear, probably colorless Fragment. 1 fragment. Broken on all sides. Warped and distored, possibly by heat. Iridescent, flakey weathering ... 1936/11/10 ... MF
MF 9510
stamp ... MF
MF 9512
MF 9513
MF
MF 9516