Hello
Does anybody know which Walkman included the MDR-3L2?

Yes they came with the first Sony Walkman the TPS-L2,did you win the boxed ones that ended on the 7th March Sony MDR-3L2 headphones ,good price missed them

Some more useful to the topic
On this Japanese website you can assign to nearly each Sony Walkman the correct headphones.

Here

Walkmans without headphone designation are this gives with different types of headphone.

An example:WM-D6C with MDR-40 or MDR-51....
WM-DD2 with MDR-15 or MDR-010....

Cool. Thanks, folks!

very good,,thanks,i didn't know that site...