These are holders that were used on the Indo-line with Siemen's iron poles. The left holder is the original model. The right one (with it's pin removed) is a reinforced model. The original model had a problem with it's pin socket developing cracks due to uneven mechanical strain from the wire. The reinforced model had rims that prevented such damage. It may have been initially used on some problematic poles or may have been introduced later on. Notice the spindle-shaped pin. It had no threads and was secured it the holder's socket only by friction force and wire's weight. It had a small groove for a failsafe tie on it's lower end though.
The smaller items are parts used to fix the holders to the poles.