OPUS 8... let's get technical

Bernard & Frederic have finally decided to stop talking about whether it belong to the line and every thing so let's MOVE to the technicalities:

Frederic, can you please provide with technical drawings/views that would explain some of the underneath, why these were chosen, which difficulties were encountered and which solutions you had to leave behind for the better or worse?

I have taken the liberty to reshuffle them by rank of my interests. (Bernard shares his views, I reshuffle complications for my interests, this place is definitively increasingly personal!)

1 sous système rattrapage de temps avec spiral
    compensating elapsed display time system with hairspring

1 minutes rétrogrades de 5 en 5
    jumping retrograde mechanism for the 5 minutes display

1 système de disques avec combinaisons de pin's pour activer les unités d'heures sur 12h et l'AM/PM sur 24H
    Pinned disc system to activate a) 12 hours (1 2 3 4 5 6 7 8 9 10 11 12) and b) am/pm indications

1 système combiné au disques, pour activer les dizaines d'heures
    combined to the above, system to activate the thenth of hours (10, 11 and 12)

1 armage de répétition minutes ( avec système de compression par rateaux et ressorts )
    Minute repeater type of activator/releaser (with compression system by means of springs and rakes)

1 rouage auxiliaire avec volant régulateur
    Auxiliary geartrain with "flying" regulator (aka as butterfly or governor, as met in some minute repeaters)

Thanks