Tom Scott Antiques has dated this piece to the 19th Century.

I have suggested wall mounting this headboard as shown, but if you would rather it had legs to attach to your own divan base, let me know and that can be done.
The intended mattress level is at the bottom of the existing upholstered panel and at this point, it measures 60 inches or 152.5cm wide, which is a standard UK kingsize…your divan would push up against the lower carved parts either side and position correctly so there is no gap!

Priced as you see it here, but if you would rather it be upholstered in your own fabric, buttoned like this or perhaps a plain cushioned panel, please get in touch.
Any queries, don’t hesitate to ask!
Measuring:

50 inches or 127 cm high from the floor in this photo
69 inches or 175.5 cm maximum frame width
60 inches or 152.5 cm wide fabric panel
The position / height in this photo would give your mattress height at around 24 inches
Tom Scott Antiques has dated this piece to the 19th Century.
Specialist dealer in french & english decorative furniture and interiors
You can view the stock and full dealer information on the Tom Scott Antiques Profile Page