Engrave back side of 14k yg disc charm with engraved "J" and flush set, 1.75mm round genuine sapphire

Make identical engraving and flush set match sapphire on back side of disc- 14k yellow gold disc charm with beaded edge design. The disc is engraved with a cursive letter "J" and has 1, 1.75 mm round blue, A quality sapphire flush set in it. 

Disc: stu# BRC783