Singer sewing machine decal set:
"Celtic Knot"
This was the decal that replaced the Wheeler and Wilson badging, after Singer spent a couple of years tweaking the W&W D9. The 9W3 was first of the class to have the Singer decals (1908 to 1913).
9W7 (arm detail)
9W7 bed detail
(Copyright photos courtesy of West Dunbartonshire Libraries and Museums and ISMACS News)