I own a 1st Gen G17 in the CE prefix range. It has the cartridge tupperware box. A local customer has a 1st Gen G17 in the Ex (forget the second letter) range that does not have the cartridge tupperware box.
Both boxes are original to their respective G17.
Your letter prefix would help to determine which box would be correct, but keep in mind that there were several variations of the tupperware box.
USMCR 1997 - 2004
PAARNG 2011 - Present
Founder - Glock Collectors Club PA Glocker #39
Looking for G22 PE389US
Multiple Armorer Certifications