TRUE VINTAGE 
SMART GENT
Jackson the Tailor, Taylored, Styliss slight sheen green sports coat
Taylored, 1 button on front and 4 on cuffs,Inside breast pockets, hanky pocket,2 spilt outside pockets, single flap at back, grey satin/silk lined. 
CONDITION: Pristine Vintage
COLOUR: Green hue with slight sheen
MATERIAL:  Wool & Terelene
LINING: Silk satin in grey, quilted
DESIGNER: Jackson the Tailor( merged with Burton in 1954)
SIZE:  Measured flat arm pit to arm pit is 23 inches, so say,  CHEST SIZE 46 INCHS
AGE: 1950 -Jackson the Tailor merged with Burton in 1954, so cannot be made after that, due to label
see link  https://en.wikipedia.org/wiki/Burton_(retailer)
ERA STYLE 1950s