WW1 Indian Army - 87th Punjabis Regiment Officer's Silver Plated and Gilt Mounted Mess Dress / Cap Button

Circa 14mm in diameter, fixed shank (solder repair) and marked 'special quality' to reverse but this is now almost impossible to read due to lead solder stain. Some polishing to highpoints and loss of detail to writing in circlet but a scarce button. Pre 1922.Comm GrSt