Every Manufacturer has it's own strongbox, with color and designs/patterns of their weapons/armor. They have a 25% chance of being a Red Strongbox. There is also a Black Manufacturer Strongbox with a 1% at 20 and 5% at level 35.
The Teknoboom Strongbox is called "Teknoboom Geldschrank" (Strongbox)
The CM one is 5% rarer, Rancor 10%, Ronson 5%, Teknoboom 20%. HIKS 25%, Spaceskin 15% and Atomic 20%