This image is being made available, not as canon reference, but as historical reference and origin for the shape and design used by many costumers.
One of Boba Fett Shin Tools made from a [wiki]aterson Chemical Stirrer. Don Post termed and created the above version of the "Survival Knife" for their full size Boba Fett statue in the late 90s.
OPINION: We have no reason to believe the original prop looked like this or is any more than the "stirrer" part of the chemical stirrer. END OPINION.