.....1950s Gaunt sliders (1946-1970), note the pinched slider end.
White Metal (Coronation Issue)
Gilding Metal
.....1957 (Up the slider)
....1963 AA (Down the slider, no pinched end)
..... also the 17/21 Lancers 1950s and also showing the "double marked London/B'ham" post 1964 AA.