Hello to All

I would like to know or have someone explain to me the purpose(s) of the following items on schematic SL35. Also, how & if these items have any relevance or concerns I should be aware of on a 1970 2.2 litre 911T:

#11 - the purpose & function of the speed switch
#12 - the electromagnetic control valve
#13 – lifting magnet

Thank you for your help & inputs
Cheers
JB