The YamahaRGX 1200 Export range

The range appears in the 1987 Western Catalogues but then the same models appear in the the 1988 catalogues along with some additional models what is obvious though is that although they have the same model designations they are not the same guitars. All models Made in Japan.
Update 23rd April 2020
Belvedere from the Yamaha forum tells me he has been looking at a 1212A and it is made in Taiwan and he has provided proof of 1212A and a 1212S being made in Taiwan so looks like they were made in both countries as other 1200 series might be.

The 1987 on the left the 1988 on the right as well has having different controls they also have different bridges the 87 are RMii the 88 RM Pro

It would appear therefore that the export models are:
RGX1220S V1 and V2
RGX1212S V1 and V2
RGX1203S V1 and V2
RGX1212A
RGX1220A

Version 1 RGX1220S 1212S and 1203S

This is a 1987 V1 1220 the pictures are supplied by the owner who is Asmikace from the Yamaha Forum. Many thanks.

Version 2 RGX1220S 1212S and 1203S

This is a 1212S Version 2

Here's an explanation of this very complex set of controls

As far as I can see this comprises 2 models the 1220A and the 1212A it might seem logical that there is a 1203A but if so I haven't found it. There is a lot of technical detail and hype in the catalogue about the pickups and controls.
Both guitars have power focus active pickups and advanced drive spectrum controls. The best way to convey this info is with scans from the catalogues