Shoulder Strap for Speedy 30 - What Size/Length?

I would like to get this older Thread and will ask, if here are some people who takes the Speedy with a strap? I don´t mean the new Bonduliere Speedy. I mean the old Speedy. And if someone have a model pic with this combination?
Thanks in advance;) And how do you like this combination?
 
hi, sorry I would also like to ask a new question in regards to the strap J52312. I was thinking of using it with my Palermo PM as a cross body wear and was wondering if anyone knew if it was long enough? The Palermo PM comes with a 28" strap and the J52312 adjusts longests to 47" is that correct? thank you!!