Your chassis is 123123. then the 10 denotes car built in Germany & manual tranny I believe. The the 133325 is your specific serial #, which is the one often used when there is a split in parts.
All models and many different years have different choices based on the specific part.

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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John