The reason for being a 2nd grade is due to the zipper not going up past the chest

Navy Blue w/ Cobalt Piping

Detachable Thermal Liner

but with age comes a few little moth holes across the piece

There's mothing mostly underneath the cap on the lining

British RAF No. 5 NCO Mess Dress Jacket - Large 104R 2000s The reason for being aAt a glance 100% Wool Body Single Button Closure Engraved "Staybrite" Buttons No. 5 Mess Dress Gilt Thread Sergeant Rank Patch For NCOs SNCOs Fully Sateen Lined Elegant Royal Air Force Grey Blue Colour Excellent Tailoring Pit to Pit: 21. 5" Suggested Size: Large Slim Label suggests a chest of 104cm Sleeve Length: 24. 5" Regular Label reads R Collar to Hem: 23" Modern Militaria Dated 2015 Genuine British Royal Air Force RAF Surplus Grades Grade 1. 5