1940's BLUE TOP Broadcloth Work Shirt

1940's era BLUE TOP broadcloth work shirt.

Not quite sure if this is a "blue collar" or "white collar" due to various details including the single pocket & smaller shell buttons vs the lower side gussets & Blue Top loomed label.
I have known Blue Top for their work wear and have a few other pieces in current inventory including chambray work shirts and lined denim chore jacket, none of which feature such a detailed label.

Forties style pointed collar

Machine loomed BLUE TOP label

Quality detailing

Slant cuffs matching the slant front pocket 

Lower side gussets