I did a little scraping on the box I am keeping. Any markings I did find were on the middle layer of tan paint. On the very bottom layer there were just the original "chest SA no15" markings.
Here are a couple shots of the markings and what I could make them out to be:
Above is the back of the chest...the outer layer of paint stripped off nicely leaving the original paint and marking.
The end of the chest....just the letters CAN.
Top and front of the chest. Top had the number 4422-23-24, along with other numbers and letters I could not decipher. The front of the chest had the number 50020 along with some of the shipping data.
The markings on the lid proved slightly more interesting. Careful deciphering makes it look like it was shipped to "officer commanding XX Canadian training B Dundurn Saskatchewan" At least thats what I think it says, some of the letters just aren't going to come back. Unfortunately, nothing that I could recognize as a Cdn serial number came up.
I am going to get some paint mixed up in the same color as the light ollive paint, strip the box down, and repaint it to include the "chest SA " markings.
I tried to get a shot of the KML marking, but I think I am going to have to play with the camera a bit more to get a clearer photo.