Follow these steps...
Does it have a second hand... Yes = 3 H = 3 Hands, No = 2H = 2 Hands
Where is the date... At 3 O'clock = 3D, at 6 O'clock = 6D
Remove the old hour wheel and measure the height with a vernier gauge, if it is between 1.02 and 1.10 then it is normal Height. Otherwise you will need a high or low version.
75% of the time you will have the most popular version which it 955.412, 3H, 3D (Normal height, not HT0 or HT3)
So that is 955.412, 3 Hands with the Date at 3. Suppliers all round the world will stock this version.
Simples :-)