Turns out Pelican sent me arms for 911 MY 1976 - 1991
,oh well at least I know what I have now.
The earlier arms 911 MY 1968 - 1975 appear to cross over to the 914 ,the 911 number is in fact 914 628 314 00 (rh side).
I noticed prices all over the place, genuine was $123 down to $45- 35 for reproduction ones.
My old wiper blades were SWF so presume the arms are too ,maybe thats the issue with the Bosch part on those arms