The front of the medal has been engraved with the Scottish Lion Rampant on the raised central roundel. The obverse is engraved:
"HARBURN E.L.R.R. CLUB Robt. Taylor. 6th Octr. 1877"
Note: I believe the medal relates to cycling & the initials may stand for the Harburn East Lothian Road Riding Club but I cannot be sure. Please do your own research.
Weight: 5.6 gm. Width: 23 mm. Height (excluding ring): 25 mm. Tests as sterling silver although not hallmarked.
Harburn: Small village in Lothian, Scotland situated 2 miles south east of West Calder & north of the Pentland Hills.
Summary: As can be seen from the photos this is an interesting & collectable medal, worthy of further research. Good luck!