Color Climax Film: Nr 1391 44 Better

Kodak Ektachrome E-1391 is a well-documented color reversal film available since the late 2000s. It's known as a successor to Ektachrome E-1392. It's used for slide photography, with rich colors and good detail. There's a newer version called Ektachrome E-400, but not E-44. Alternatively, maybe the user is referring to another film like Kodak Ektachrome E-400, which is ISO 400, but again, that's not 44.