Hello,
I came across this model which I never suspected the existence, and you?
Oyster Perpetual DJ
Left model of 1955
guilloche dial
Jubilee Bracelet
Date 'roulette'
Fluted bezel (probably white gold hue seen warmer than the rest steel?)
Bubble back (or 'ovettone' for ours italians friends)
Credit S.Mazzariol 