Vintage WW1 WW2 army military shirt size 16.5 17 short

For sale here is a military shirt we think to be pre WW2 but its not out area of expertise so any input would be great. 

Measurements

 Sleeve - 22.5

 Shoulder - 18

 Length from top of collar - 37

 Chest - 22

Fit - 16.5 short

Condition - Excellent