Edwin Walker Brown opened a motorcycle shop in Melbourne in 1902, and by 1910 was assembling motorcycles with JAP motors. The photo is of two 6hp 1914 V twin EWB-JAP engined machines,
Laurie Fox on 4821 and H Amey on 4820, both of Mount Gambier. The 18105 number was Victorian, as there was no reciprocity and dual registration was needed to travel over the border.

EWB 1902~1914 (Vic.)

Image credit: VCCSA