Board is Sainval 13127 in good condition with 2 sails.
Got this board wanted to try but realize that Daggerboards can't be attached there is simply hole without any attachment maybe someone can help me to identifie what part I'm missing. Thanks

Itxs a 1983 board.
Shove a piece of plywood into the slot.

There are no attachments it will simply fall from it ... the pictures of Daggerboards are from this board ?

I have no idea about that board but the centreboards pictured are all pivoting centreboards so there must be a slot of some sort in the hull that takes the pin on the centreboard.

Do a search for the Algeir centreboard kit to get an idea of that the whole system looks like.

Actually I spelt it wrong...
www.surfsailaustralia.com.au/product/surf-sail-australia-allgaier-daggerboard-kit
Have a look at the bottom photo and you can see the channel the pin slots down into

SHOVE plywood in, not slide it in.

It's so old I can't find any pictures of it it is centreboard so it isn't retractable as I understood. but when it is installed it can be taken out or only with the box ?

Select to expand quote

LeeD said..
SHOVE plywood in, not slide it in.

And I have this Daggerboards that came with it was thinking to reuse them, and one is with screw first time see one like this.

None of the centre boards you have are original to the board so won't work even if you find the casset part to fit in the board. The first board I owned was one of these back in 1981. Next board was a Sainval fun.

I agree with Lee

The board is worthless so make a marine plywood board that will be a snug fit, bit of ply across the top to stop it falling all the way thru and a strap. $20.

Now you will still have a board that's worthless, but at least usable.