Flexible spring members can be dimensioned for securement to an associated gas spring end member. The flexible spring member can be at least partially formed from elastomeric material. The flexible spring member can also include a marking disposed along a surface thereof that includes one or more indicia. The marking can be at least partially formed by an indicia layer and an outer layer. The indicia layer can include one or more quantities of material that at least partially form the one or more indicia. The outer layer can be formed from a quantity of material that is disposed overtop of the indicia layer such that the one or more indicia of the indicia layer are substantially encapsulated. Gas spring assemblies, suspension systems, methods of manufacture and manufacturing systems are also included.