Petroliana Collectibles

SPARK PLUG ADS

HILL INSULATING & MFG. CORP.
New York, NY

	Date of ad:  February, 1920   Number of pages:  Small ad   Size:  8 1/2" X 11"   Price:  $3.00 Also ad for Joly plug on same page Hill-1
	Date of ad:  August, 1920   Number of pages:  Small ad   Size:  8 1/2" X 11"   Price:  $2.00 Hill-2
	Date of ad:    Number of pages:    Size:  8 1/2" X 11"   Price:  $

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