Hi Guido, nice and important cruet set!
Initials/monogram
PVE conjoined, 18th century Belgian master registered in Brussels; Petrus
van
Eesbeeck. Baptized 30-5-1691, master 5-12-1717, buried 27-10-1742.
The cruet set below
is not made by Petrus van Eesbeeck but looks similar with the proper Brussels guild marks;
Reference; Zilver met Brusselse Keuren Jacques Vanwittenbergh 1979
Best,
Peter