Edward Vandyk in the UK had provided these pictures and information about a Wabatso sun roof installed in his MGA Coupe.

And here is a note from Edward:
"The sun roof was not a factory fitted option from the Heritage Certificate, but the sun roof in the car has a label on is saying 'A Owen' Clapham.

I saw on the internet: The Trimming Centre, Unit 6, St.Joseph's Business Park, St.Joseph's Close, Hove, East Sussex BN3 7ES, UK Tel/Fax: +441273 325256. Their advert is below".

[Quoting the internet ad]
Tudor Webasto Coachbuilt sunroofs
Pioneers of the fitting of the Webasto sunroof. handed down through generations over the last 55 years.

At the start of Tudor Webasto in the UK George Camp pioneered this sunroof with a small team of craftsmen after hours in a workshop in Clapham London. Developing over the years into Roof Installations recognised at that time as the main suppliers and fitters of the Tudor Webasto coach built sunroof in the country. In 1969 George and his son, Steve Camp, started the Brighton franchise C & D Autos. At the height of the industry fitting around fifty Webasto sunroofs per week in the mid season.

George is now retired but Steve carries on the traditions at The Trimming Centre in Hove not only with the Tudor Webasto & Weathershield sunroofs but the complete range of Webasto Hollandia sunroofs from Glass pop tops to inbuilt Original Equipment type roofs. The Trimming Centre can repair and refurbish classic sunroofs, headlinings and vinyl roofs. Also offering a professional interior upholstery service.

[Edward]   "I have spoken to Steve and his father (George) is still alive aged 96. George worked for A Owen which is where the Webasto product originated and they used to fit them in the evening. I think George was one of the originators. A Owen only fitted sun roofs for about 3 years around about 1962 (the Coupe was registered in September 1962). Apparently they still have the original colours and headlinings.

So a dealer fitted accessory but I would think dating from on or about delivery. The car was not registered until 11 September 1962. Maybe putting in a sunroof was the only way of shifting it given that the MGB was on sale by then.

Regards
Edward Vandyk"