Curious variation of the tuners.
When the band embarked on the Australian leg of the Unmasked Tour Paul showed up with a custom Hamer double-neck. When this guitar was part of the Convention Tour Museum it was described as a "one-of-a-kind custom Hamer doubleneck guitar designed by Paul Stanley" but how much of it—if anything at all—that was actually designed by Paul is unknown. The body of the guitar is basically just a twin-neck version of the Hamer Special but with the necks closer than customary, something that probably created the slightly odd headstock shape. It was a necessity so that the tuners would fit. The skeptic in me tends to believe that Paul's contribution was probably limited to the mirror pickguards which bears a striking resemblance to Gene's makeup design.
Looking a little closer at the specs, this custom double-neck had the same split abalone inlays that his previous Hamer Standards had. The pickups appear to be EMG but there's no visible relief logo in the available photos that allow me to to say for sure. (I have to admit that I don't know of any other active pickups from this time.) The bridge was probably Hamer's Sustain Block bridge. The most perplexing detail about this guitar was the tuners: each headstock had chrome Schaller M6 on the "outside" and unknown pearloid tuners on the "inside".
As far as we know this guitar was used very little during the tour, and what use it got was late in the tour. As most fans wil be aware the Hamer double-neck is not part of the concert footage from Sydney on November 22. The first photo we have is from November 25 in Brisbane. Based on the three photos below and the news footage from Wellington, for these shows Paul started the show using the double-neck. In the news footage we see a few seconds of Paul using it for "Detroit Rock City" and, as seen in the photos below, the top neck has a capo at the 4th fret. THe capo was used for "Shandi" which indicates that durign the very tail end of the tour the Hamer double-neck was used for the first four songs of the show.
Before leaving Australasia the band went into the studio to do some overdubs for the Inner Sanctum special. Presumably in an effort to bring as few instruments as possible, Paul showed up with the Hamer double-neck. (Since all his guitars were, probably, equipped with EMG pickups by this point, they would have been able to get a very similar sound out of any of his Hamers.)
For some reason the custom Hamer double-neck returned for the 10th Anniversary Tour in support of Creatures of the Night. The photos only show that it was used one time and then for the opening of the show. The capo on the top neck is on the 3rd fret which was for "Creatures of the Night". In the second photo Paul's playing the un-capoed neck so he has to have used it for at least two songs. Around this time Paul was mentioned in Hamer promotional material. In a rather illustrious list of names who had purchased Hamer instruments—no giveaways here—Paul was noted as having bought three Standards and one double-neck. Since this managed to completely overlook two custom Vectors I think it's reasonable to call into question how well the records at Hamer were kept in the late 70s and early 80s.
The custom Hamer double-neck ended up in storage after the end of the 10th Anniversary Tour. It was brought out for the convention tour where it was correctly identified in the Convention Museum display but the description in the tourbook was a complete shambles, suggesting that it had been used in the "Hard Luck Woman" promo film. By 1995 the pickups had been changed to unidentified humbuckers. When it was auctioned off at Butterfields in 2000 (Lot 1600), Paul's design contributions were no longer part of the description.
