Up for immediate purchase is this collection of 17 AC Spark plugs as shown.

The 5 Used plugs are: 2-44 with 4 white Ribs, & 3- 44-5 'Coralox Patented'...5 used total. The other 12 plugs are NOS. 

The "Patented Coralox" script on the smooth porcelain was from 1952 to 1956. It was ended during 1956...Not the entire Year. The Boxes continued to have it still printed on the outside. The 4 Rib plain spark plugs came out in the Fall of 1954 until May,1959. (The rare ones have 'Coralox' only under the plug number as they only were made for a year. )Then the four ribs in May, 1959 got the 4 equal Green stripes. The 4 equal green stripes ended on Oct. 01, 1974. The wide upper 'Band' replaced the stripe on the new porcelain...this change & date signified the merge of AC Spark Plug Division with Delco Division of GM becoming AC-Delco.    

 

SHIPPING: ONLY to all 50 states of the USA...any outside addresses will be cancelled....including Bay's Global service out of Erlanger, KY (Cincinnati Airport)