A bell from a new world

Item #: SCP-xxxx

Object Class: Safe

Special containment procedures:
SCP-xxxx is to be disguised as a spicy crust pizza restaurant. The cover story is this is part of a new expansion into Europe. Ever health inspection is necessary the room containing SCP-xxxx to be covered by an old carpet, and the door leading to the room is to be locked. If the inspector is persistent. The personnel are to prevent him from entering via reasonable means. If repairs to the building are necessary they are to be done by a foundation front organization.

Description:
SCP-xxxx Is a old building with a church bell in it, with the marking. Eigentum der AFSS. When ringing the bell produces a ear piercing noise. That will cause nausea vomiting bloody noses to all who are in range of it. Even if the person it is in a soundproof room the fact of SCP-xxxx will still occur. The bell is made up of an unknown metal. SCP-xxxx was contained on April 7, 1998 In Liverpool United Kingdom.
Addendum-xxxx-1:
Well cleaning the containment area a worker discovered a diary. It was later translated from German.

Transcript of the diary

July 15, 1964
I’ve just been promoted and now I’m here. In this little English city the higher ups are worried about the Yankees bombing in this place. I doubt they well I’m more concerned about Berlin or Rome.
December 5, 1964
We just got a thing new thing from the higher ups. I don’t know what it does no one does the way they talked about it. Made it sound like a monster or super weapon. They want us to test it honestly I think this is a waste of time. Why do we have to test it why can’t they.
January 6, 1965
I’m currently writing this from my hospital bed. The they gave us definitely works. It almost killed me and killed my friend. In all honesty I don’t even see how it will work someone need to activate it. So it would not be a good weapon.
January 12, 1965
Weird things have been happening and it’s scare me. It all started when we turn on the bell, and now people are disappearing. Well it’s only one person at least for now. I’m honestly surprised I still have this diary.
February 7, 1965
These last few days have been hell. It all started when I decided to go down to the sewer after seeing a cat fall into the ground. There was no hole and yet it fell. After what must’ve been a few days I heard voices. Which were fortunately human, two men saw me and took me to a hospital. Then i woke up and saw a nurse and asked her for the date. She said it was February 4.
February 10, 1965
I had a wonderful visit with the chief of police today. I tried to tell him I’d out rank him but he won’t listen. He asked me why I was dressed up like a German soldier I told him we’re here to protect them from the Americans. He didn’t understand I tried to tell him that the king of England requested German military forces be placed here in case of an American invasion. He told me we don’t have a king we have a queen what the hell is going on.
February 14, 1965
This is it my world this is a different one entirely. Apparently the Russians won the war. Germany is now apparently split into east and west. I’m going to make an escape from this hospital.
March 1, 1965
I’m currently surrounded by them this is all I have left to say. Before they take me away to that hospital again where they say I belong. If my commander find this tell my wife I love her.
Sincerely Jürgen Unger.
Expiration log:
D7783 was sent into the door of SCP-xxxx. Communication with was lost after five minutes. No more explorations are to occur.
Addendum-xxxx-2:
Upon further investigation it was determined that SCP-xxxx was most likely designed to be a reality anchor.