Chas: 504591-, with Factory Code #2 - If " Factory Code " is needed, you must look at the Product/ ID plate looking from left to right on the 1st line, this code is in the 5th position.
Chas: 506610-, with Factory Code #1 - If " Factory Code " is needed, you must look at the Product/ ID plate looking from left to right on the 1st line, this code is in the 5th position.