Hehe. I'll go in a different direction than Denis. The second pair of numbers, when models have such a name, indicates the date the particular pickup or pickup arrangement first came out. Thus...At this point, it's going to be a 55-10 if that pickup doesn't get here soon from Nordstrand!
I don't know what to call it. I barely understand the Lakland numbering code as it is. I'm wide open to suggestions!
4-94: When Lakland first designed the MM/J setup.
44-07: Chi-sonics designed.
4-76: The year Music Man designed the Stingray 'bucker.
I think 55-01 and 55-02 were the years those basses were introduced. Either that or Lakland just wanted to have the 01 be the lowest model and 02 the step up.
Note that these model numbers are all used with the 44/55 body style. That's why I was thinking 55-57, for the 55-body with a split-coil P pickup.

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