The earlier Traveller model (1.3702/54591) was likely introduced in the late 1970s and was the progenitor of the modern Climber (early 1980s?). However, unlike the current Climber, it did not have the keyring attachment, and at that time no models had the multipurpose hook. It was unavailable in North America after the mid 1980s. The no-keyring variations are sometimes available in other markets, and can appear from time-to-time, if a large order is requested by a re-seller or distributor.
From SAKWIKI.