yeah good point dT175F is 2N5 prefix
however the DT175F has the same electrics as yours...hey ho
have a look here, you can clearly see the switch item#3 in the handle fiche, to me that makes yours a 175F, i really cant imagine someone changed the loom and switch at any point
http://www.cmsnl.com...8692/partslist/
http://www.cmsnl.com...8652/partslist/