~old eternamatic watch - late dads~

Hi there

great group forum, Ive just been handed a very old watch of my late dads called eternamatic with the case number of 4263174 and i would like to get more detailed information on it. Ive been wearing it for two weeks now, great time keeper, see attached photos, i think it has its dial replaced.

ive searched the eterna group on this forum and i would like to know more technical movement info for it...

thanks in advance...singhy