This is a guaranteed original German overcoat from WW2. It is dark gray leather, very thick and heavy, and a large size. The measurements are

Sleeves: 24" or 61 cm

Shoulder to Shoulder: 20" or 51 cm

Base of collar to hem: 51.5" or 131 cm

Chest size is 42 (European 52)

The tailor mark is Tschache + Co of Dresden.