Good ol' Kodachrome! It sure helps you appreciate the dynamic range of modern digital sensors! Of course, I do have a custom picture control curve to replicate its look...
Kodachrome was great stuff of course and enjoys a well-earned reputation for retaining an almost eternal image quality. Kodachrome required a complex processing and unfortunately I learned too late that Fotomat was NOT the place for processing. As a poor college student and penniless new employee upon graduation, I occasionally used Fotomat to save money and now so regret it. Thankfully I reguarly returned to Kodak/Kodalux processing as soon as I could, but then that too eventually became terrible as Kodak began to engineer its exit from the business in the mid-2000s.
In disgust, I shelved my camera and quit taking pictures for five years until the D5100 was introduced, bringing price and quality to an acceptable point for me.
A 45 year old Kodachrome with Kodak processing. [Nikkormat FTn] Gotta love it.