These are highly collectable, and have the sweetest sentiment. 
This one is  a classic design. As with all of these Augis pieces, it is engraved + Qu'hier - Que'demain, meaning more than yesterday, less than tomorrow. A really lovely way of expressing the ever evolving nature of love. 
This piece has the Augis makers mark and also features the French Eagle head mark for 18ct gold. 
Weight approx 2.24g 
Total drop approx 24mm 
Width approx 16mm 
Very good vintage condition, with patina.