A question about threaded vibrato arms

When did G&L stop making the threaded tremolo arm/sockets? Where these only used on certain models? If so, which ones would and wouldn't have that?

When did G&L stop making the threaded tremolo arm/sockets? Where these only used on certain models? If so, which ones would and wouldn't have that?

From G&L's On-Line Store description for the VIBRATO ARM - G&L DUAL FULCRUM (EARLY)

Used on all US G&L Dual Fulcrum Vibratos from the late 1980s through mid 2000s. This arm is characterized by its raw machined satin finish with no chrome plating. Available in Right and Left hand versions.

Diameter: approximately 0.25" or 6.35mm

If you have an early- to mid-1980s G&L model such as SC-3 or F-100 which uses a screw-in vibrato arm, you can use this style arm by replacing your vibrato arm socket (080170-100) available elsewhere in the G&L Online Store. However, our recommendation is to use a vibrato arm for a USA Fender Stratocaster equipped with the vintage style vibrato. Screw-in Fender Stratocaster vibrato arms are available from many retailers such as Stewart-MacDonald or Allparts. Note that the early G&L vibratos using screw-in arms had black plastic tips. Often retailers will sell replacement arms with white tips but will sell different color arm tips separately.

I believe all models with the DF tremolo, from the early- to mid-1980's, used the screw-in vibrato arm.

Hope this helps.