1986 Warwick Streamer - Push/pull pot - or not?

Does a 1986 Warwick Steamer Stage 1 have a push/pull pot to switch between active and passive pu´s ? The Warwick Owners manual says so , but I wonder if they might be referring to newer models. The one I have does not seem to have a push /pull pot. Or is it just stuck ?
Had it about a month now - Today Its clean up day , with washing, waxing , fret poliishing, new strings and fine adjustment. Love it. Thanks !