Thanks guys - been a bit busy at this end and have now got round to having another look at the 35RC.
Quite right - the engraving is on the bottom plate and not the door - been stupid there!
But I've found the 2 screws for the door and removed it.
Thanks for the info about this.
I've now been able to clean out all the old seals rather more easiliy. I had no idea there was so much in all the nooks and cranies until I used my jeweller's eyeglass. Some I couldn't get at using Jon Goodman's little bamboo tool and needed some sort of hook instead.
Now some time back I was offered a set of old dental tools and picked up a bundle of half a dozen. I thought they just might come in useful sometime. And there was a most useful hook in the collection.
So next time you go to the dentist ask what happens to his old tool!