This firm is mentioned briefly in "Duwvaart" by Jansen & Van
Heck on p. 89 as one of several firms taken over by the well-known
Smit
International.
Stoomsleepdienst (Steam Towage Service) Mars flew a green
– almost square - flag bearing a large white five-pointed star, shown in
b/w in above book.
The company emblem appears on this
book cover of "De sleepboten van NV Stoomsleepdienst Maas en Stoomsleepdienst
Mars" by J. Toussaint. The blurb mentions that both firms were taken
over by Smit in 1972.
The star also shows up on a funnel in some of these
photos.
These examples indicate that Stoomsleepdienst Mars may indeed have
used a square or squarish house flag, which is rather unusual..
Jan Mertens, 26 Feb 2006
Some sources seem to indicate the use of a square, or an almost square,
flag but the Binnenvaart site shows a pennant and another Tugspotter photo
shows a rectangular flag!
See the rectangular flag on this
page, last photo (tug ‘Mars V’): and the pennant on Binnenvaart’s
house flag page (42th row, third picture).
By the way, the green in these images is rather darker than the one
at FOTW-ws.
Jan Mertens, 4 Sep 2006