Anyone help me with this picture. It is my wife's grandfather who was killed in the Belfast shipyards in 1920. We think he worked there before WW1 so doubt he served then but are not sure. Think the cap badge is RIR but we are uncertain. Also there appears to be something hanging from his left tunic pocket as well. Is the uniform standard for 14-18 or earlier? His son was Ulster rifles from 1929 and was awarded the MM for services at Caen in 1944. Any help would be appreciated thanks.