First raised as a regular French unit in 1674, Provence had 2 battalions. It was at Hastenbeck and then Rossbach, where it was brigaded with Poitou Infantry and suffered heavy casualties, including its colonel seriously wounded. At Rossbach it was second in the centre (reserve) column behind Poitou. In 1758 it was at Krefeld but not engaged. In June 1759 a battalion of the regiment was attacked in its post at Erbefeld by troops of the Prince of Brunswick and driven back, with some men killed and wounded and 92 taken prisoner. However, it retreated in good order. In 1761 it was at the battle of Vellinghausen and fought well but suffered heavy casualties. Its final battlefield appearance of the war was at Wilhelmstahl in 1762. [Details from Kronoskaf and C. Duffy's Prussia's Glory.]
The flags as depicted were carried by this regiment from 1675 to 1780.
And this plate shows the uniform and flags in 1757: