Hi Christos,
Thanks.
There's a relatively rare two screw version available now (on sale!) in Australia.
Vintage Tool Disston 9 Improved Backsaw Regan Patent Saw Antique Old Tools 48 | eBay
Bit pricey and no gauge.
These gauge saws were sold by Jim Bode. Rare DISSTON Gage Backsaw w/ Improved Handle, Near Mint and Rare! DISSTON No. 7 Gage Saw with Decal
Cheers,
Rob