German Awards - Prince Bismarck Commemorative Medal for the 50th Anniversary of Service and 70th Anniversary. Birthday party

This medal was issued on the occasion of the 50th anniversary of the service and the 70th anniversary of the birth of Reich Chancellor Prince Bismarck.
Whether there was an official medal fund is unknown to me. It can be assumed that this medal was awarded to those present on the occasion of the celebration of the anniversary of the service. Silver medals are also known. They were probably passed on to high-profile guests. The seal was made by medalist K. Schwenzer. I would really appreciate more details.

Round bronze medal with raised border.

Front side:

• Along the edge, separated by a line inward, the inscription:
• – 4. JUNE 1835- Separated by a 5-petal flower - PATRIAE - INSERVIENDO - CONSUMER -
"In
• the service of the Fatherland, I devour myself. - separated by a 5-petal flower -
• - June 4, 1885 - divided by a 5-leaf flower, below in the opposite direction:
• - REICHSKANZLER - PRINCE - BISMARCK -
In
• the closed field is a portrait of Bismarck in general form, facing right.
In
• the cervical region are small: - K. SCHWENZER -

Downside:

• Along the edge is a lovely pearl cord. In the center is the curved coat of arms of the prince.
• It is held by 2 eagles with spread wings, crowns and a coat of arms on the chest.
• The coat of arms rises above the princely crown. Left and right are also held by eagles
• 2 standards with different drawing. Eagles stand on a horizontal line.
• They are separated in the center and connected by ornaments down.
• Starting from the line, a ribbon curved down with the inscription:
• - IN - TRINITATE - ROBUR - Power in the Trinity. Bismarck house motto.
• Below it is a horizontal shield with a central ornament down and the inscription:
• – 1815 – 1. APRIL - 1885 - The entire background is filled with light oak branches.