I have seen an image where the leather panel you refer to is now hanging at the boarded up entrance to the Computer Centre on Two Deck - or at least it was!
It is a valuable embossed leather picture (195 cm x 120 cm) created at the beginning of the art nouveau style. This picture once hung in the First Class Smoking Room of the NDL express steamer Kaiser Wilhelm der Grosse – the largest passenger ship in the world when introduced and the first German passenger ship to capture the Blue Riband.
After completing the re-engining of QE2 in 1987, the German shipyard Lloyd-Werft presented the picture to Cunard at the Handover Ceremony on 25 April 1987.
From then until 1994 it hung on D Stairway Upper Deck.
From 1994 to 1999 it hung at D Stairway One Deck.
In 1999 it was re-hung in Chart Room (aft bulkhead) replacing wall of framed charts.
The top image shows the aft bulkhead with the framed charts (1994 – 1999) while the bottom two show the leather panel in situ in the Chart Room.