For those tigers built at Mascot they were not an aftermarket option
All the Australian built Tigers were for the RAAF, save 18 for the USAAF and 41 for the RIAF, and the purchasers opted for slats. Slats were never offered as an after market option by any Tiger manufacturer that I'm aware.
From 1931 article -
The following special equipment is supplied at extra cost when it is desired to use the machine for duties other training:— Ten-gallon auxiliary petrol tank (larger auxiliary tanks can be supplied at the expense of other load); bomb racks to carry four 20-lb. bombs, complete with release gear ; bomb sight ; camera gun ; gun sight ;Marconi A.D. 22 wireless apparatus ; P. 14 camera with slides and envelopes ; parachutes ; Handley-Page automatic wing tip slots ; slot-locking device, operated from cockpit ;metal airscrew ; navigation lighting ; turn indicator ;drinking-water tank ; ration boxes; floats
My mount, courtesy of owner John Henderson, was the 78th aircraft off the Mascot line.
