John C.      White SG	  S/N 800156

Pot codes (all 4 are the same) 134-62 41
Centralab 24th week of 1966
5 layer, black top Bat Wing pick guard; sanded down to 3 layers
Bell shape Truss Rod Cover

P90s; mid-late '60s type with philips head hardware on bottom.
Stop Tail/ABR-1 bridge (no wire) with Nylon Saddles

800156   '66 to '69.
Dimensions:

Scale Length:    Nut to 12th Fret is 12-1/4", so 24-1/2"
 or "rule of 18"? Need to verify.
Number of Frets:  22
Neck:Body joint at 19th fret
Volute at HeadStock?   (start mid '69)

Nut width:    1-9/16
Neck Depth at Nut:    7/8
Neck Width at 5th Fret:    1-13/16
Neck Depth at 5th Fret:      15/16
Neck Width at 12th Fret:     2
Neck Depth at 12th Fret:     1-1/32
Neck Width at 19th Fret:    2-7/32
Neck Depth at 19th Fret:     1-3/16

https://solidguitar.fandom.com/wiki/SG_Special#1961-1965
 "reflector" control knobs with volume and tone text; with pointers
No poker chip, and I can't see a sign of one having been there impressed into the finish.
3 screw holes where the factory trem tail would have been mounted and finish impression
 Rear headstock finish shows original tuners would have been 3/side w/scroll pattern top and bottom mounting plates; it currently has Grovers. The type of factory tuners used seems to have changed to these around '67; that is the earliest I could find in  photos that matched.

Polaris White- standard 1962-1968; special order afterwards
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Problems/Solutions:
Poor Action:  MUCH improved now. Playable just fine, perhaps not perfect yet. Intonation similar, could be a few cents off sharp.
Cut new nut: may improve action further
Truss Rod adj (straighten neck) OK
Intonation way off: flip B and E saddles OK
Drill, plug and re-drill all pickguard and control cavity cover screw holes; most are really badly worn out.
Properly drill and re-plug 3 factory trem holes
 Bridge posts are not square to body, nor correctly positioned. Optimum solution would be to remove them, drill out plugs and re-install large studs for a wrap around.
Ground wire needs to be routed to stop tail somehow, as the nylon saddles create an ungrounded guitar.  Existing ground wire terminates at high side bridge post, not tail post.
Bridge/Tail Replace/Install
Install parts as below
Parts Needed:
Switch Tip: White
Poker Chip: Black
Pick Guard:   BatWing 5 Ply Black Top
Replace with correct verisons all small wood screws p/g, truss cover and rear ctl cover. Also P90 adjustment bolts need replaced (rusted/etc.)
Tail/Trem:    Wrap around bridge or Bigsby
Bridge:    PigTail?  WrapAround Aluminum large studs; compensated for 3 wound/3 plain.