|Object Name||Badge, Military|
Brass badge with "M.G." between a wreath and mounted on a back. Badge is in three parts. top is separate "MG" section with two loops at the back. Middle section is brass disc with the wreath attached and which also has two loops at the back. It also has two holes through which the "MG" loops go through so that the third part - the brass pin - goes through all four loops securing it altogether.
MG possibly stands for machine gun (http://www.diggerhistory.info/pages-asstd/abbreviations.htm)