A stainless steel calendar chronograph wristwatch with registers and phases of the moon, Universal, 'Tri-Compax' 1950s

gilt lever movement, mono-metallic balance, silvered dial with Arabic and disc numerals, subsidiary dials for date combined with phases of the moon, constant seconds, 30-minute and 12-hour registers, apertures for French day and month, luminescent hands, case, dial and movement signed.