Trying to translate to info that's come with our new to us Knaus, and all I can find is it's MIRO weight, and that was only after a web search which said it was 1500kgs MIRO.
Single I would suspect, I think it's the 625TK that's twin.
------------- XVI yes?
As well is two words!
How does a sage know everything about everything? or does he? or does he just think he does?
Remember, if you buy something you bought it, not brought it.
If your weight plate has dropped off you can put a new one on yourself with max loaded weight of caravan as max axle weight rating. If it has Al-ko chassis, axles are rated at 1600kg & next one up is 1800kg. If Miro is 1500kg I would think your axle will be rated at 1800kg. If you examine axle carefully the weight rating should be stamped on it somewhere.
Miro is unladen weight plus other bits like gas bottle etc. Definition has changed a bit a couple of times over the yrs. For your purposes call it the unladen weight. As pointed out, if plate is missing then you can plate at max axle weight provided tyres have sufficient load rating for that weight.
Are you sure 1500kg is empty weight? A quick google of your caravan over several results suggests it might be gross laden weight, ie mtplm. I suggest you take it to a weighbridge.
You can get the unladen weight by taking it to a weighbridge & your max loaded weight is the rating of the axle provided tyres have sufficient load rating, thats all you need to know. If you want a plate you can make one using those weights. Its quite legal as UK does not register caravans & trailers like cars. Caravans do not have reg. docs. or numberplates so it's only construction & use law you have to take heed of. Provided design weight of components are not exceeded you are ok.