Based on perand65 and lucassiglo21 9mm cases. I modified the case to fit the Sheffield 12628 field box (11.25in x 5.50in x 7.70in) and the 3-pistol Case Club gen2 case. I also added debossed logo and labels. Please refer to the photos for previews.

This is a 70-round 9mm ammo case. Sheffield field box could accommodate maximum of 8 of these ammo cases.

Each case consists of three (3) printable parts for better mixing and matching of colors. You may want to add a color change though during slicing to highlight the logo.

For the base, you need to print these two (2) files:
Box9mm-x70-Basetray.stl
Box9mm-x70-Basegrid.stl

For the case cover, you may choose one (1) depending on your preference:
Box9mm-x70-Lid.stl ~ cover has logo, '9MM' and '70 ROUNDS' labels (for reloads or mixed types)
Box9mm-x70-Lid-FMJ.stl ~ cover has added FMJ label (for Full Metal Jacket 9mms)
Box9mm-x70-Lid-JHP.stl ~ cover has added JHP label (for Jacketed Hollow Point 9mms)
Box9mm-x70-PlainLid.stl ~ cover has no labels nor logo, if you prefer it plain or would like to modify it yourself

NOTE:

• for best result use 0.4 nozzle and 0.20mm layer height
• you may use headless nails for the hinge like I do but filament or gi wire also works
• just like the original thing, there's a built-in support material in the locking mechanism of the cover which you need to remove using small needle nose pliers or cutting tool