As far as I’m aware, the accessories contained in the box supplied with the the Elna Grasshopper were as follows …
503707 Darning Plate
503773 Standard Presser Foot
503866 Hemmer Foot (earlier machines) or 503884 Hemmer Foot 4mm (later machines)
503854 Hinged Presser Foot
503852 Darning Foot
503251 Speed Reducer
503704 Small Screwdriver
503876 or 503673 Large Screwdriver
503770 Right-angled Screwdriver (up to machine s/n 145600)
503893 Oil can
503882 Kerosene Bottle (earlier machines) or 503898 Kerosene can (later machines)
Also in the Accessory Box was the elusive Tray, which is part number 503847.
As time allows, I’ll try to photograph most if not all of these.