I believe the the factory-delivered W124 E60 generally (always?) did NOT have the AMG logo on the speedo face, and also had a stock / standard 260kph faceplate. However, some post-delivery conversions may have the AMG logo and/or a 280-300kph speedo faceplate, as the conversions were à la carte and if the owner asked for a faceplate change, AMG was happy to take their deutsche marks. There was never a W124 E50 produced.
For the W210 E50/E60, all should have the AMG logo on a 280kph speedo face, from the factory.