Vintage circa 1950s Harpoon Brand British chore coat.
 
Marked a vintage UK size 38. 
The measurements can be found at the bottom of this listing. 
 
Cotton drill, faded tan with general wear wear, marks and paint marks inside and out, some glue type residue on the sleeve.  Change button fastening (some slightly mismatched).  Patch pockets and side access slits.   Faded with areas of uneven colour. 
See photos. 
 
Laundered.
 
18" seam to seam across the shoulders at the back
Sleeves are 22 1/4" from the shoulder seam to the end of the sleeve
From nape to hem is 43"
20 1/2" across the chest under the arms measured flat
20 3/4" across side to side level with the top edge of  the lower pockets