This is Vintage  Man's Diesel Industry Denim Division Blue Jeans.
Diesel Industry logo on back.
Button fly
Size 34" x 31"
Color blue, 100% cotton.
Measures approx. 
Waist  34"
Inseam  31"
Front rise 11" waist band not included.
leg opening  8 1/2" (17") 
Very good vintage pre-owned condition, show some sign of wear.
Please see pictures for more details.