This model, with the "Beauty" name only appears primarily to have been sold in Japan - it normally doesn't turn up elsewhere. There is some confusion about which model it is. Sugiyama - I suspect authoritatively - simply names it the Beauty, but identifies a very unusual f3.1 lens variant (otherwise identical) as the Beauty IIIS - it has a visibly large lens pair in Sugiyama's photos. McKeown I think muddles the two, listing a Beauty and a Beauty S with apparently identical attributes. Either way, it is effectively a nameplate variant of the Beautyflex S.
Taking lens is FC Telmer 80mm f3.5
Shutter is TKK MX 1 to 1/300