French silver pocket watch for Catholic priests Circa1880

Pocket watch with Jesus cross on the back
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An extremely rare pocket watch for Catholic priests, made by Henri-Paul Ratel, Horloger Bté. De Notre Saint Père le Pape, on 53 rue Monsieur le Prince in Paris, France, circa 1880. The numbered open faced relief case of this watch is crafted from silver and has a Jesus cross on the back, the middle section is inscribed in Latin and the dust cover is marked “Hora Christi, (modèle Déposé),  approuvée par NSP le Pape”. The unique enamel dial with church events that are assigned to specific times has an interesting pointer mechanism with an additional golden hour hand which moves at a constant interval of two hours ahead of the actual time. The movement has a cylinder escapement.
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Diameter: 47 mm
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Weight: 93 g
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Signed: No name
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Henri-Paul Ratel
Henri-Paul Ratel founded a watch and jewellery shop around 1820 in Paris at 53 rue Monsieur-le-Prince. He held the title Horloger Bté. De Notre Saint Père le Pape à Paris . According to a Ratel letterhead, Rue Monsieur-le-Prince Nt. 53 before 49, prés (at) l’Odeon Faubourg Saint Germain. The company was active until about 1900. The company won a silver medal at the 1889 World Exhibition (Eiffel Tower).