This is a blue 58mm Classic SD with United States Navy seal printed on the front, and the inscription “Chief of Naval Operations”.
Because the US Navy print is on the front side, the Victorinox shield is moved to the back:
This is a 85mm Wenger Commander from the Europa Star Series. In this series there are also an Esquire, a Traveler with synthetic scales and a Traveler with alox scales.
Instead of the Wenger logo these knives have the logo of the European Union, with the 12 stars on azure background.
This is the Victorinox Solo. It is from the discontinued 108mm series with nylon scales. It is a robust knife with only one large blade. There is also a knife called the Solo in the 93mm series with alox scales. The 111mm series also has a knife with only one blade, this is the Sentinel.
For some reason I have some difficulty catching the color of the scales on a photo. The scales are red but it depends on the light exposure if the color appears more towards red, red-violet or wine-red… interesting.
external links: SAK Wiki
This is a black 58 mm Victorinox Classic SD with “Army Strong” inscription.
“Army Strong” was the recruiting slogan for the US Army from 2006 until 2015, when it was replaced by the “I became a soldier”-theme.
“Fort Leavenworth, KS” refers to the US Army installation at Leavenworth (also called the Intellectual Center of the Army), which -among other things- houses the US Army Combined Arms Center, the US Army Command and General Staff College, the Foreign Military Studies Office, the US Disciplinary Barracks and Fort Leavenworth National Cemetery.
Because on the front of the knife is the inscription, the Victorinox shield is moved to the back side.
This is a red 58 mm Victorinox Bijou SD with inscription. A Bijou is basically a Classic without a keyring.
The “ARMY TACMS” refers to the Army Tactical Missile System, which is a long range guided surface-to-surface missile that is fired from a multiple rocket launcher like the M270 MLRS and HIMARS. The missiles are manufactured by Lockheed Martin.
The missiles were first used in action during the Gulf War in Operation Desert Storm (1991). I’m not sure but I think the “Combat Proven” inscription suggests this knife was made (shortly) after Operation Desert Storm to commemorate the first in combat use of the TACMS. The fact that Victorinox stopped manufacturing the Bijou model in that same period supports this assumption.
On the back side of the knife you’ll find the usual Victorinox shield.