Help to find the history of my 1900's Armstrong cycle :) Pretty new to the whole vintage bike thing so would love a bit of help finding the history of the bike I bought in Walthamstow, London, last year.

It's marked to be an Armstrong Cycle, Birmingham, which I have found a lot of information on, but mainly around the 'moth' models and tandems - I can't seem to place the 'Havana'. I'm looking to find the approx date of creation, and perhaps a bit more about it's stand-out features. 

Here's some pics.  

It's got the original seat, bell, lights and 3 gears - it's in great working order.

Any help would be much appreciated :)

Charlotte
From http://www.bikeforums.net/classic-vintage-bicycles-what-s-worth-appraisals-inquiries/850018-1957-armstrong-havana.html it looks like it could have been made form 1957 to 1961 or later. It looks like it has a 3 speed internal hub gearbox, probably a Sturmy Archer, as it is British made.

Appears that Armstrong was part of a larger group by this stage, and the ealier design approach may have changed a lot.

If you look under where the pedals are (the bottom bracket), there is often a serial number which may contain the year of manufacturer. Or it could be stamped elsewhere on the frame.