yes, the movement is Cal.911 which used in more pocket alarms during that period.
as Nico said in other posts, Memovox with Cal.911 is not very commonly found. that's why i have aimed to hunt one for my collection.
to my knowledge, most of the time, i found them made under an US version instead of European one. but am not sure why!
my one looks mint, in very good condition and it gold-plated. i was so lucky to see and buy it after the seller just posted it within 30mins in his store.
now, i am still hunting for Cal.489 which is the earliest one of all Memovox. hope it can come soon 
thanks, Blomman.
stefan