First, determine the year of manufacture by checking which letter in the printed logo on the glass has a letter under it. (You need to know the decade) Toughened or LAMINATED .......... .......... 1234567890 1234567890 Next find the month of manufacture: . Jan TRIPLEX (dot over the T) . Feb TRIPLEX (dot over the R) . Mar TRIPLEX (dot over the E) . Apr TRIPLEX (dot over the X) : May TRIPLEX (double dot over T) :. Jun TRIPLEX (double dot over T and dot over R) : . Jul TRIPLEX (double dot over T and dot over E) : . Aug TRIPLEX (double dot over T and dot over X) . : Sep TRIPLEX (dot over T and double dot over X) . : Oct TRIPLEX (dot over R and double dot over X) .: Nov TRIPLEX (dot over E and double dot over X) : Dec TRIPLEX (double dot over X)
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