All the numbers are matching. The wristband is 100% original which is very rare to find but has been shortened by the pilot (see pics) as a usual watch and not over a flight overall or flight jacket.
This watch is of course 100% original and in working order but would probably need an overhaul. The item "WWII LUFTWAFFE LACO B-UHR FL 23883 GERMAN PILOT OBSERVER WATCH ORIGINAL VINTAGE" is in sale since Saturday, June 03, 2017. This item is in the category "Collectables\Militaria\World War II (1939-1945)\Field Gear".
The seller is "collectors-corner-club" and is located in Paris. This item can be shipped to all countries in Europe.