You'll find that the previous sailor made it up to the rank of Petty Officer First Class as shown by the sleeve patch along with 2 service stripes

Velcro Adjustable Waist

which are engraved with "IV" with a harp in the centre

Chest Size: 44" | Suggested Size: Medium Regular - Label states a chest ranging from 96 - 100cm

just with a few less buttons than the ones often seen a few decades prior

British Royal Air Force No. 1 O.A. Dress Jacket - X Large Canada You'll find that the previousAt a glance 100% Wool Body 2 Button Chest Pockets, 2 Flap Waist Pockets & 2 Internal Slit Pockets Button Closure Afghanistan Service Medal w Rosette, HM The Queens Diamond Jubilee Medal 2012, HM The Queens Platinum Jubilee Medal & Royal Air Force Long Service and Good Conduct Medal Medal Ribbon Bar Engraved Eagle "Staybrite" Buttons Swooping Eagle Airman's Shoulder Patches Telecommunications Qualification Patch Chief Technician's Rank Patches Fully