If you managed to make your way through the various blogs to this point and continued reading, there is one point that should and probably is apparent…your interest in the Labrador and Voyageur. So it is likely that you will have figured out on your own the various locations, on either variant, where the roundels were placed. That said however placement of the roundel on the underside is not quite as obvious, in part because of the shortage of decent pictures.
Roundels have been placed on the underside of the fuselage of Labradors only once (SARCUP), while on the Voyageur the under fuselage placement of roundels occurred in two separate eras. The first time the Voyageur wore roundels on the underside of the fuselage was while the aircraft were still dressed in Army livery.
409 Wearing early white markings and 400 series numbers with the red ensign on the aft pylon.
White the photo above does not allow us to identify which aircraft it is, three things are of note. Firstly, the aircraft has black numbering, secondly the helio has the new current Canadian flag on the aft pylon and lastly note the Mobile Command emblem below the left side pilot's glass door.
313 The only airframe to wear the variegated camo livery has the roundel on the underside of the fuselage. This aircraft had black 300 series numbers.
I have viewed too few photos of the underside of the Voyageur to conclude roundels on the belly were standard marking for green Voyageurs. Given that the roundel was located in this position on the 400 series aircraft and that pictures show that they were also there while the aircraft wore interim SAR markings before being painted yellow suggests that they likely were in this location for all of the Army schemes…but I cannot prove or disprove the theory. The pictures below show 315 in the interim SAR markings and while the roundel is there it is somewhat difficult to make out.