Breguet

golden hands
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both use the calibre fp11.50

the calibre 511 used in the newer(old model used 510-less jewelling) 5907 is the fp11.50 which is 11.5 lignes=25.6mm and re-engineered by breguet without the automatic winding and is fitted with the winding power reserve indicator fitted as the 'slip'type mainspring which would not holt when fully wound and you would be manual winding continually the crown as the mainspring kept slipping.

the 5920 uses the same fp11.50 but with the automatic winding rotor fitted and the original bridges-breguet cal 516.

both use 'direct' seconds at 6 position and as mentioned the 5920 has a date module.

i myself own the 5907 as i wanted to own the fp11.50 in the manual wind form as this movement is a true classic icon and i prefer manual wind watches.

i agree the 5177 in both its forms with the grand feu enamel dial and breguet numerals and the 'rose engined' gold(epns-english term) are very fine automatics

i myself would go for the 5967 with the fp15.75 lignes cal 15 for a classic dress watch with its mondrian painting 3D cube dial

hope this is of help