(Continued from discussion - "Mrs Val Nash" Dec 2 2009)
Kai-eric, when I saw your photo:
http://www.helpmefind.com/plant/l.php?l=21.134242
it reminded me so much of one of the many faces of our "Not Souvenir d'un Ami" aka "Huntington Mme de Tartas" aka "Rose sold as General Tartas" (see top right pic on p188 of Tea book).
I suspect it's just a case of two different roses looking similar on a certain day as the prickles on "Not Souv d'un Ami" are slightly hooked whereas those on your 'Comtesse de Caserta' appear to be straight, descending.

"Not Souv d'un Ami" etc etc has a number of features that make it easy to distinguish from other Teas over time.
The hip is an unusual shape for a Tea - usually pear-like.
The new growth can have (but not always) a most distinctive purplish-red colour - on the stems and on the underside of the leaflets.
The leaflets often turn up from the midrib.
Stems have a glaucous bloom. (that's probably a tautology but I hope you know what I'm trying to say)
The fragrance is strong and sweet. To my nose, the sweetest scented Tea rose I know.
The fragrance always conjures up a strong memory of the way what we call 'boiled lollies' used to smell - and memories of visiting the sweet store where the sweets were stored in large glass jars with screw lids. When the boiled lolly jar was opened, there was a wonderful smell of sugary sweetness and old-fashioned fruit essences and this is what the rose smells like to me.
Pedicels are always smooth.
Colour and form of bloom are very variable. In cooler weather they can be very full, globular, quartered even and the colour tends to be paler. In hot weather they are barely semi-double and tend to be dark pink, carmine, red - ragged and informal, quite China-ish.
In milder weather they come in shades of mid pink, coral, rose pink and tend to be informal cups - the depth of the cup variable.
It is very decorative, blooms a lot - repeats its bloom quickly in our climate.