Boxed as in NEW condition? It's a valuable find!
KodaChrome came in both slide and print version and is color. It uses Chromium as the reactant to light radiation.
even if stored at the perfect temp - and was perfectly sealed - time is a killer to film as it looses its sensitivity to the light bomabardment due to hardening of the surface layers - and the half life of the chromium - just like uranium slowly dies even when sealed up in the Nevada desert (or so we hope) so it gets more likely to underexpose with time. the Brownie (one of which was my first camera) does not have a shutter speed or aperture adjustment - so you get what you get - sometimes the developer can compensate - but with most development using the new equipments (and operators - I doubt that 18 year old gal working the photo counter even knows who Simon and Garfunkel are let alone how to rescue under-exposed KodaChrome) are not going to be able to compensate. Your best bet is to call around and find an old guy or gal running a small shop - but unfortunately they are mostly gone due to the ease of modern development - or try some of these folks (and the good news is you can still find fresh film for it) -
http://www.brownie-camera.com/buyfilm.shtml
ohhhhh the memories:
When I think back on all the crap I learned in high school
It's a wonder I can think at all
And though my lack of education hasn't hurt me none
I can read the writing on the wall.
Kodachrome, they give us those nice bright colors
Give us the green of summers
Makes you think all the world's a sunny day, oh yeah
I got a Nikon camera, I love to take photographs
So mama don't take my Kodachrome away.
If you took all the girls I knew when I was single
And brought 'em all together for one night
I know they'd never match my sweet imagination
Everything looks worse in black and white.
Kodachrome, they give us those nice bright colors
They give us the greens of summers
Makes you think all the world's a sunny day, oh yeah
I got a Nikon camera, I love to take photographs
So mama don't take my Kodachrome away.
Mama don't take my Kodachrome away
Mama don't take my Kodachrome away
Mama don't take my Kodachrome away.