https://drive.google.com/drive/folders/1CaoVOWyfVK_F8ih-9-J2x9yD0cVwF5x9 contains a gigantic PDF to submit once compressed, the scans [in the event the PDF has too many issues and should just be rebuilt], and the originals in the event the transposed scans are too compromised in quality...

Catalog 352 shows the Lignatone rotary valve brasswind line [plus woodwinds] - number 351, which I still am looking for, shows piston brasses.  The "Amati concern" is listed as the main brasswind factory.
Some interesting bits include the use of Schmidt-style mouthpieces, various translation quirks, and mention of Toneking saxophones - that indicates this was published before Amati-Kraslice lost the ability to use the Toneking name in 1955*.

Ligna is listed as the sole distributor of these instruments, so I figure this catalog is from after the 1948 Communist takeover and nationalization of industry.  I remember seeing some Ligna catalog with prewar models, so this might be from the early 1950s?  Ligna also distributed string instruments and a variety of wood products.

Their address is given as 41 Vodičkova, Praha II, Czechoslovakia. 
The print information on the back page is ČOK 230174 a - 5403  /  Printed in Czechoslovakia - Sčt 01-2491-54 - similar codes are on German-language Cremona/Luby catalogs [interestingly referring to the town as Schönbach].

*Amati's 2021 catalog has a tiny note in the saxophone section calling them "Toneking line", so I guess they're back to their old tricks yet again

Interesting indeed - also, I forgot to mention how the models looked very pre-war, compared to many Lignatones that are standard Amati-Kraslice horns. 

Some of the model numbers seen in this catalog are referenced as "old/formerly model X" in the 1980s Amati rotary catalog I acquired several years ago.

In addition to Ligna Catalog 351 piston brasses, I'd like to see the full Ligna catalog from the late 1940s that has Arigra models shown!