The following links take you to Internet versions of the specified instruction manuals
Argus C3 Argus C33 Argus C33 Parts Guide Argus C4/C4R Argus C44/C44R Argus C44R Parts Guide Filter Magic
Additional Argus camera and accessory manuals may be found at the following ACG member personal websites: Hrad Kuzyk Alexander Rawles James M. Surprenant