Box (2) - for rosary - Silver - silver egg-shaped box

Two antique silver boxes in the shape of an egg. They were used for a rosary (the right one still has it). The left one with ribs and a height of 5 cm and a date letter that probably dates from the first half of the 19th century. The problem is that I can no longer open the box at all!!
The right-hand piece in good condition with snap closure and complete with (silver-plated?) rosary. Engraved meander border and ornaments on the sides. Height 4.5 cm. Marked with a small sword and a maker’s mark, but unclear—something like IH3.