If using two film cannisters, a sliding knife built into the bottom of the camera can be used to slice the film so that the canister containing the exposed film can be removed while preserving the unexposed film in the main canister.   This knife is operated by plunger type rod screwed into the camera top.

View showing  sliding knife built into the bottom back of the camera operated by plunger type rod screwed into the camera top. You can just make out the knife in the middle of the view.

Above are two photographs taken with Start camera at Woolpit Steam 2006.

As you can see and also  mentioned towards the beginning of this website.  This website is a work in progress and not that well organized.  My excuse is that I see this as  a sort of scrap book -  OK it is just a first attempt at using free software to create an interesting website. The next camera I decide to do will be more polished and will probably be the Zenit 3m SLR or the folding Kodak Retinette.  I am still on a steep learning curve on how to create a site using Linux.  For those interested in free software I suggest the following for Linux  

 Links    -    NVU HTML    KDE ShowFoto     GIMP    JAlbum   &  MEPIS Linux    

For MS Windows users I suggest  

 Links    -    GIMP    Gimpshop     Paintdotnet   irfanview    &  Xnview  

 I would advise MS Windows users to try  Gimp or the Paint.net option as I think these are the best and quickest way to get into free photo editing without spending loads of money Paint Shop Pro, Elements or Photoshop.  There is even a version of Gimp called Gimpshop which  attempts to look like Photoshop.  Most of these options are also available for the Apple Mac OS.