Can't help you with an exploded view, but here are some infos about the Webra "Rekord":
http://static.rcgroups.net/forums/at...-Scan10003.jpg
http://static.rcgroups.net/forums/at...-Scan10001.jpg
http://static.rcgroups.net/forums/at...-Scan10002.jpg
There was 3 versions of that model over the years:
http://www.rcgroups.com/forums/showp...&postcount=580
Being in europe it shouln't be too hard to find parts for it as it was produced in large number in the 50's and 60's!