[quote name='discreet' timestamp='1509019592' post='3396060']
IIRC, the Precision first appeared in 51, then what you could call the 'Sting' version (two-colour sunburst with white guard) was from late 54 to mid-57, the 'new' version with humbucking split pickup, revised pickguard and headstock shape was from mid-57. Rosewood boards appeared in 1959 and tort guards around 1960. All these dates are fluid - being Fender there were aberrations and exceptions aplenty depending on availability of parts, etc.
You are correct. In 58 you could get a 3TSB with gold guard and one-piece maple neck and in 59 a 3TSB with gold guard and rosewood board - which was only available for one year, hence its rarity. 3TSB, tort guard and rosewood board appeared in 1960.
All approximate, of course - Fender transitions are notoriously hard to date with 100% accuracy.
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So does that mean by definition the MiM Roadworn is a sort of 57 re-issue or did 2TSB persist beyond the introductory year (and apologies to the OP for hijacking!)?