The page https://sailboatdata.com/sailboat/manta-19 needs a few minor corrections, that might be important for people deciding width of harbour berths. I know this because I was passed over in 2019, when I had to decline on an offer of a too narrow berth, based on my harbour master’s reading of data on your or similar sites.
The data should reflect the numbers on the Manta 19 owner site https://manta19.miwd.co.uk/page/manta-statistics.
It is suspected that the builders for some reason slightly underdeclared the dimensions as your data matches sales prospects from the 70’ies. However, my Austrian-built Manta 19 #205 closely matches the Manta 19 owner site data.
Fianlly, your builder info should read: Schöchl Yachtbau/Sunbeam Yachts (AUT) / Blakes Marine (UK)
Best, Mogens Sørensen, Copenhagen