Rare WW1 Period British Brown Cotton Drill Coverall Trousers

A fresh to the market and interesting pair of WW1 era Brown cotton drill coverall trousers which still retains much of the original paper sizing ticket. The high fish tail backed trousers are in good used condition and retain good strong colour, does appear slightly lighter in a couple of photographs . There is a later applied War department acceptance stamp (unknown early one) along with a Royal Fusiliers 7 digit service number which I believe to be roughly around the 1926/7 period, During the inter-war period Officer`s wore brown coverall clothing but this pair appears to be much earlier due to paper sizing ticket (unfortunately date missing), brass buttons for brace attachment, two slash pocket openings, some stains and dirt/paint marks present. Waist size 31-33 inches x height 5`7 inches-5`8 inches , does appear longer in the leg than stated on ticket. Part of uniform group from one family (Yates) who served as officer`s during WW1 & WW2, I have not researched the service number in depth to find out whether worn by a member of the Yates family and served in the Royal Fusiliers.