Found this website
http://catalogue.klaseboer.com/vol2...switzmis.htm which provided the descriptions below:
Railway Stamps
1913-1957 Railway stamps, inscription "Schweiz. Bundesbahnen Chemin de fer federaux Strado ferr. federali", value in black (except otherwise mentioned)
Many other values exist: 5 c brown, 10 c blue, 20 c olive, 25 c yellow, 30 c green, 40 c green, 50 c blue, 60 c orange, 70 c violet, 80 c olive, 90 c blue, 100 c red, 200 c violet, 300 c violet, 500 c grey, 1 Fr orange, 2 Fr red, 3 Fr violet, 4 Fr yellow, 5 Fr grey, 10 Fr black and red (value in red), 20 Fr brown, 30 Fr violet and 50 Fr red. A complete listing with all the types can be found on:
http://www.timbressuisses.ch/cadre.htm. (website no longer functioning)
Thought this will at least give you a little more complete information on what you have.