SHOW AND TELL 119: P-38 (P-51) or FRED? Choose one or both?

SHOW AND TELL [119]: P-38 (P-51) or FRED? Choose one or both?
examples used:
P-38 Can Opener, 1.5" (Inch) length, U.S. SHELBY CO., MALIN SHELBY HARDWARE INC., Shelby, Ohio.
(1942 design)

FRED (Field Ration Eating Device) NATO Stock Number (NSN) 7330-66-010-0933, CMI 2007.
(1943 design, Australian Defence Force, New Zealand Army),
2 cm long fold out can opener blade,
3 mm hole is drilled through the device at the can opener end,
Defence Stock No: 7330-66-010-0933,
Contractor: CMI Pty,
Defence broad arrow.

Not shown:
P-51 Can Opener, 2" (Inch) length.

References:
P-38:
https://en.wikipedia.org/wiki/P-38_can_opener

FRED:
https://victoriancollections.net.au/items/4f72af3397f83e0308603e77
https://en.wikipedia.org/wiki/Field_ration_eating_device