Yes it is a Brompton luggage block hacked and fitted with metal jubilee clips wrapped in black tape to make it look a little less industrial. With the three clips, one below to rest on one through the middle hacked part to hold it firm against the head tube and one on top to hold it all down, it is rock solid. I carry heavy loads (lots of milk and wine/beer/cider bottles) in the open bag and it is rock solid. Probably could have brazed on some Brompton type lug if I had the skills and or tools but I don't and this works.

Not needed on the F frame bike of this post though, as they have nice front rack fittings already.









Shown with the bag I use on my Brompton. I don't use this bag so much but do use the open Brompton bag mainly for week day trips to the local shops for supplies

Again all the details are on the flickr link above.

Regards

Jerry