Hi does anyone know the part number of the air switch missing as per photo below please thanks

 

 

It is the same part on the S Type .
The part numbers you require are
BD 21864 Knob for vacuum control box
BD 21901 Clip for securing knobs
Having said that I doubt very much if you would be able to find a single new replacement knob. SNG don't recognise the part number.
The actual control box with the three knobs complete is BD 22960 but again you are not going to find that part for sale new.

I have just looked through my box of many parts and I have two spares and I only need one as a spare. I would not be willing to split the knobs from the box as they are made of Bakelite which over time becomes brittle so trying to remove them could break them. Please PM me if you would like to do a deal. This photo is of the actual item. Posting it to Malta would not be a problem.



here are a couple for sale on E Bay this one is complete with the knobs for £25.

https://www.ebay.co.uk/itm/185533341...Bk9SR_yS0PnvYA

There is also a brand new old stock one for sale from the USA. States it is for the Daimler Limo part number BD27062 but looks correct. Possibly a Daimler part number as this part was fitted to the S Type. 420 420G and the Daimler Limo.

https://www.ebay.co.uk/itm/265090885...Bk9SR8TM6PnvYA

 

thanks so the buttons clip on or to attach the button i need to remove the whole unit ? Pm with the price of your unit please thanks

 

what you need is the button, not the whole vacuum switcher.

replacing the switcher requires removing the wood radio panel, a delicate job. Instead try to find a button from an old radio.

 

Their are many vacuum switches lying around on old S Types to remove a button from. So many of them were scrapped for the IRS for kit cars, hot rods, Cobra replicas you name it. Malta is full of Jag bits.

Price is ridiculous. Make a stupid offer. The buttons just pull off. Careful use of pliers & a cloth to protect from scratching. Clip will come with it.

https://www.ebay.com/itm/195299650150?hash=item2d78c42a66:gUUAAOSw~kpjAdD O&amdata=enc%3AAQAHAAAAsPI77%2FAnhDpFkO8BIzB7w7TAV oCYimmJ0EGe8WT7nXgmsDoMXckRIRyUFtU6LTk2mckqXFRhvuM D0KbJ3L%2BJYZQft0uQab5ig%2Bj8vSzwwXwO1Y%2By3xBx9FW GpZoc9Sw3j7mR8Gq6jkcTm3pkXe1uTF0H3OnsH60XABZn11mPs lsFhQAVzGlFKiAmaRtYYAnd8I3d3Vh%2B%2B05KadRtxQHsc5f 3Bkfoelerx5qnNhMGwz7m%7Ctkp%3ABk9SR8Lo0pXwYA