The Westminster SG models were SG copies produced by Matsumoku. The SG-250 was a rebranded Aria ES-175, which was also sold as the Fantom SG-300. The SG-330 was also badged as the Fantom SG-360, and is very similar to the Aria Pro II SG-380.
Related:
Westminster SG-250 / Fantom SG-300[]

1978
- 25,000 Yen (1976, Westminster)
- 30,000 Yen (1977, Fantom)
Body:
Neck:
- Nato neck
- Bolt-on construction
- Joins body at 17th fret
- Rosewood fretboard
- Acrylic pearloid dot inlays
- 12" radius
- Generic headstock
- Silk-screened Westminster logo
- 21 frets
- 24 3/4" scale
- 1 9/16" nut width???
Electronics:
- Two single coil pickups
- Humbucker style covers
- 3 adjustment screws
- 3-way switch
- 2 Vol, 2 Tone
Hardware:
- Chrome Hardware
- Individually enclosed tuning machines
- Metal Keystone buttons
- 4-ply Angel Wing style pickguard
- Bell shaped truss rod cover
- 2-ply b/w
- 3 screws
- Black Witch Hat knobs
- Tune-O-Matic style bridge
- Stopbar tailpiece
Finishes:
- Cherry Wine
- Walnut
Westminster SG-330 / Fantom SG-360[]

Some examples have no crown or diamond/crown headstock inlay.
- 33,000 Yen (1976, Westminster)
- 36,000 Yen (1977, Fantom)
Body:
- Beveled, solid Nato body
- Pancake style construction
- Nato top & back veneers
- Polyurethane finish
Neck:
- One piece quartersawn Nato
- Bolt-on construction
- Joins body at 18th fret
- Rosewood fretboard
- Acrylic pearloid small block inlays
- 12" radius
- Open Book headstock
- Mother of Pearl logo inlay
- Inlaid crown or diamond/crown
- Maple veneer
- 22 frets
- 24 3/4" scale
- 1 9/16" nut width???

Fantom SG-360
Binding:
- Neck, single-ply
Electronics:
- Two humbuckers
- 3-way switch
- 2 Vol, 2 Tone
Hardware:
- Chrome Hardware
- Individually enclosed tuning machines
- Metal Keystone buttons
- 5-ply Angel Wing style pickguard
- Cort-style truss rod cover
- 2-ply b/w
- 3 screws
- Black Speed knobs w/ pointers
- Tune-O-Matic style bridge
- Wide travel design (sporadic use)
- Stopbar tailpiece
- Optional Bigsby-style tremolo (Aria 1922T)
Finishes:
- Cherry Red or Cherry Wine (CR/CW)
- Walnut (WA)