4350 could be April 3rd, 1950. The 43rd batch of Kodachrome developed in 1950
or emulsion batch number 43 of Kodachrome from that year (did they also imprint
emulsion batches on slides, nor just boxes?) or none of the above/something
else. But these are just guesses...

Perhaps Henry Wilhelm (type his name into Yahoo! to find his site/email) the
famous archival materials expert (has tested lots of present/older? films)
knows these obscure old Kodachrome film number details.

Alternatively you could call Kodak at 1-800-242-2424 and ask for the number for
their professional or some other division/tech person that would know these
details. I doubt that the "tech rep" over the phone would know as they might be
the $7 hired hands just reading about their modern products from some modern
database that wouldn't include such info.

In any case, best of luck/success.

Check out my photos at "LEWISVISION":

http://members.aol.com/Lewisvisn/home.htm

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***DUE TO SPAM, I NOW BLOCK ALL E-MAIL NOT ON MY LIST, TO BE ADDED TO MY LIST,
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Hmm. The slide mount styles are shown at
<http://www.trainutz.com/rcMOUNT.shtml>, indicating that your
"Kodachrome Transparency" would be from the 1950-1955 time period.
<http://www.historicphotoarchive.com/f2/kodachrome.html> will let you
narrow it a bit further.

Kodak's official page on date codes is at
<http://www.kodak.com/US/en/motion/support/h1/identificationP.shtml>,
though this is for the emulsion, not the mount, and unfortunately for
motion picture film.

westin@graphics.cornell.nospam.edu wrote:

Westin-

Thanks.  the second site narrows it down to 1949 to 1952, because the slide
number is stamped rather than printed.

Examples show an obvious date stamp, as "May 2  1949".  Looking closely at the
number stamped on the slides, I see that the 4 and the 3 are very slightly
offset vertically, as if they were separated.  The 4350 could possibly indicate
4/3/50.

Fred

May not help but try this:
http://www.taphilo.com/photo/kodakfilmnumxref.shtml
Film best,
me

["Followup-To:" header set to rec.photo.digital.slr-systems.]
mark.thomas.7@gmail.com <mark.thomas.7@gmail.com> wrote:

Well, the Yahoo-logi is nice, but the "Sorry, this GeoCities
site is currently unavailable." is not as interesting to me
as it seems to you ... :->

-Wolfgang