Folks - thanks for the responses and help. Gosh your assumptions cracked me up - too funny! - I'm not a young collector - been collecting for over 50 years and I know that V is for Victory and that …- is the Morse code for V. FYI, Hubby and I are both rather interested in military history, too. My dad was a WWII Vet so I grew up hearing all about it.
Apologies for being unclear - I should have worded my query differently as this is more of a postal history question. I'm curious about whether or not this was an officially used marking on soldier's mail or was this probably just something the sender applied as part of the Indicia to jazz up his cover.
I'm no authority on postal markings, but I have viewed thousands of WWII patriotic covers on eBay over the years. I do not recall ever seeing this particular imprint. I doubt that there would be any official markings for free soldier/sailor mail since all that was required was that it be marked "free" and the sender include their service number along with name. This was likely created by sender, or someone they acquired it from, to provide a more distinctive "free" marking.
Note that this cover is cacheted, so it probably is philatelic in origin, which would go with the special "free" marking. Normal soldier/sailor mail would not have a cachet, and in most all cases just as a manuscript "free" where the stamp would normally appear.