Hi Rob
I think that price tag must have fallen off something else and accidentally got stuck on the Waltron as they were one of the more "budget sets" and cost £105.85 + £5.56 for the dual charger = £111.41 for the 4 channel set (February 1975 RCM&E). That compares with £198 for an OS Diamond, £177 for a Flight Link Sovereign 4, £154 for a Skyleader SLX 4, £143 for a Futaba M4, £142 for a Sprengbrook Sportsman 4, £136 for a Swan 73 4 Channel, £134 for a Skyleader Clubman 4, £130 for an RCS Digi 4, £126 for a MacGregor IV, £125 for a World Engines Blue Max, £112 for an OS Cougar, £108 for a Horizon HS4L, £105 for a Digi-Fleet Custom 4 and only £85 for a GEM 6 with 4 servo's, but most people have nick-named the GEM the "toilet seat", due to its looks and performance! The only things cheaper than the GEM 6 were kits from MIcron and Remcon.
What is interesting on the same page is an advert from Sheffield Hobbies Centre advertising their "own" brand set which was made for them by Waltron, but with Skyleader SCR1 servo's and mounting trays supplied, rather than the FB-3 servo's included with the Waltron (well with the set I've got anyway). But it cost more £129.60 complete, but I don't know if I'd have paid £18 more for the Skyleader servos?
Mike