T-3 headlight date codes - NCRS Discussion Boards

T-3 headlight date codes

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  • Chuck G.
    Extremely Frequent Poster
    • May 31, 1982
    • 2029

    #16
    Re: T-3 headlight date codes

    Originally posted by David Liukkonen (3775)
    Thanks Chuck,

    This confirms what I have found about the date codes.

    Dave
    I wish I could remember where I "pirated" that picture from. It's NOT my original work or research. I'd like to give the proper credit, if I was able.

    Chuck
    1963 Corvette Conv. 327/360 NCRS Top Flight
    2006 Corvette Conv. Velocity Yellow NCRS Top Flight
    1956 Chevy Sedan. 350/4 Speed Hot Rod

    Comment

    • Terry M.
      Beyond Control Poster
      • September 30, 1980
      • 15573

      #17
      Re: T-3 headlight date codes

      Originally posted by Chuck Gongloff (5629)
      I wish I could remember where I "pirated" that picture from. It's NOT my original work or research. I'd like to give the proper credit, if I was able.

      Chuck
      Chuck,

      I remember that as part of a larger drawing of the headlamps, but I can't remember who posted it here either.
      Terry

      Comment

      • Michael H.
        Expired
        • January 29, 2008
        • 7477

        #18
        Re: T-3 headlight date codes

        Originally posted by Chuck Gongloff (5629)
        I "pirated" this picture/chart from someone, so I'd like to give that individual credit.

        Hope this helps the discussion.

        Chuck
        I have the rest of the print but there's not a lot of useful information on it. I can dig it out and post if necessary.

        Comment

        • Steve D.
          Expired
          • May 16, 2011
          • 106

          #19
          Re: T-3 headlight date codes

          Don`t know about the dates. But to say the originals are sensitive would be a grand understatement. I would defineately only use them for judging purposes. I would also only install them at the event. This may sound paranoid. But I have run through 2 sets. I believe that alredy as stated can cause them to quit. Also dang near any vibration. I have since just settled on the repop t3s

          Comment

          • Dan D.
            Extremely Frequent Poster
            • November 5, 2008
            • 1323

            #20
            Re: T-3 headlight date codes

            I do not wish to pirate this thread, but I thought I would add some 7" 1957 questions into this mix as it is a good T3 thread. If you rather I start a new post I will.

            My 57, which I have owned since 1971, has T3s that look almost identical to Lectric Limited sealed beam guide. The only difference I can see is at the top they have a 3 digit code molded it. One is;

            D-15
            TOP
            12-V

            other is;

            K-41
            TOP
            12-V

            The 3 digit code and TOP are molded into the glass. The 12-V appears to be on the inside of the glass.

            By the way, they both work, but I have not left them on for more than a few seconds.

            Is the 3 digit code a mold marking? If a date code, it does not make sense. I have not taken them out to look at the back side.

            If these have any value for judging, I can make them available, as my car will not be judged. Either way I think I will remove them and install repops, as I don't trust them. -Dan-

            Comment

            • Greg T.
              Expired
              • January 1, 2004
              • 136

              #21
              Re: T-3 headlight date codes

              T3 markings by year.
              Attached Files

              Comment

              • Dan D.
                Extremely Frequent Poster
                • November 5, 2008
                • 1323

                #22
                Re: T-3 headlight date codes

                I very carefully removed both T3s from my 57 today. Rear marking at the top (stamp) is;

                G
                5400
                12V *
                4 7 2

                Both are the same. If that decodes to April 2, 1957 - that would fit as my car has a birth date of May 21, 1957, or there about. Would the * be the shift?

                Below the terminals and molded in the glass, one is;
                G-55
                TIC

                The other is;
                G-82
                TIC

                Any ideas on decoding this gobbly gook?

                -Dan-

                Comment

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