People   (Re-unions, trace old friends and relatives.)

Seems strange that the A&SH Museum cant throw any light on his family background, the info you have says he was born in Kelvin and joined in 1925 age 18 , that puts his birth at 1907? looking on the Scottish records there are 3 one is James Young Clark born 1908 , his mothers maiden name was Young, James Kennedy Clark born 1907 (mother maiden name not given ) and James Clark born 1907 mothers maiden name Stevenson, all born in Kelvin
I think the c/e on the bracelet was his religion i.e Church of England??
but if the museum cant throw any light on it then it is way beyond me, but if by any chance something does turn up then i will let you know