Company Names, addresses, dates:
  Irwin Drug Co, 19 N. Braddock, Winchester VA

Notes:
William Irwin was listed in the 1930 US Census as a Pharmacist in Winchester.
I found the Irwin Drug Co in Winchester listed in Virginia drug store directories from 1927 and 1929. I could not find it in 1924 or 1935 directories, so the drugstore likely started sometime between 1924 & 1927 and lasted until sometime between 1929 and 1935.

The bottles below look like they're newer than the 1920s/1930s - it's possible that the drug company lasted longer than my research indicates. It's also possible that someone slapped Irwin labels on some newer bottles.

	This is a Green, 3" machine-made bottle with a label: label: SYRUP SQUILL / ... / IRWIN DRUG CO., Inc. / "Just a Real Good Drug Store" / 19 N. Braddock St., WINCHESTER, VA.
	This is an Amber, 3" machine-made bottle with the following markings: embossed on the front & back shoulders ROUX label: MOSQUITO LOTION / ... / IRWIN DRUG CO., Inc. / "Just a Real Good Drug Store" / 19 N. Braddock St., WINCHESTER, VA.

This is a cardboard fan on a wooden stick, from the Winchester Irwin's Drug store. It says: front: ... / IRWIN DRUG Drug Co., Inc. / "JUST A REAL GOOD DRUG STORE" / 19 N. BRADDOCK St., Winchester, Va. /... rear: (various advertisements)