Featured Help with mark on Blue Onion pattern saucers

They’re nothing special at all but I’d like to know who made these saucers. They’re clearly marked in blue underglaze and I’m sure I’ve seen the mark before but it’s not in Röntgen or any of my other books. Something in the back of my mind about Holland.

All help welcome as always.

 

Royal Tettau https://www.ebay.com/itm/234887028982

 

Thanks but I don’t think the eBay seller is right. I’ve looked at Tettau marks.Tettau did use an underglaze blue T but not with the distinctive turned down ends .

 

Here is one from replacements but the blue doesn't appear as deep?https://www.replacements.com/china-royal-tettau-chateau-blue/c/86641

 

Here is another https://www.etsy.com/listing/147447...allery-1-2&frs=1&sts=1&organic_search_click=1

 

Thank you. I see a lot of sellers are describing the mark as Royal Tettau although it’s different from the marks in books and on online marks sites.

 

They're not Blue Onion, are they? More like Strawflower or Blue Fluted.

 

Ditto. Blue onion is floral and asymmetrical, Indian inspired.

 

Agreed.

 

It seems to be Chateau Blue pattern. Everyone calls pieces with this mark Tettau but it's nothing like the T mark in Rontgen or on Porcelain Marks and More or the Old Stuff sites.