Finally

[bl**dydrivers]

Got a Lucas HF-1441 Horn, been looking and trying to get one for 3 years.
Come across acouple on Ebay, that I didnt win, but that has changed as I won this.

It wasnt cheap, but after contacting Taff from the horns, who said the waiting list is extensive.

I treated myself to this, with the brackets and in working order 

Does anybody know the size of the bolts to attach it to the bottom yoke?

[trevinoz]

Yeah Mate,
                       They should be 2BA.
How many leaves are there on the vertical bracket?

  Trev.

[manosound]

What is the story with that horn? Is it much louder than the stock Altette or just specific to one model A10 or A7?

[trevinoz]

The HF 1441 was fitted to the nacelle models from 1958 until maybe 1960-61 then the 8H was fitted.

  Trev.

[bl**dydrivers]

Hi Trev,
I dont know how many leafs it has, I havent recieved it yet, Im just so excited I finally got one and one it off Ebay 

I think they were used till 1962,

[cyclobutch]

Cripes I have one that looks just like that. Still on the bench ... I fitted something cheap and nasty that you can't hear over the Goldstar cans. perhaps I'd better have another look at it.