The B17 is our flagship model, ideal for long distance sports touring, trekking and atb use. It has been on the market for over 100 years, being featured in as early as the 1898 catalogue . The model is available for gents and ladies: the B17 (gents) and B17 S (ladies). The Standard models feature black steel rails, the B17 Special features copper plated steel metalwork, and the B17 Titanium … Both the B17 Special and the Titanium also feature hand hammered copper rivets.