Answers.Body: <p>Oh, I should have read further down the page. There were special panes of "glass" in frames that fit the slots.</p>
  
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Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-11-26T20:08:42.080Z
Answers.LastActivityDate: 2014-11-26T20:08:42.080Z
Answers.LastEditDate: 2017-03-10T09:42:48.853Z
Answers.UserDisplayName: Mr. Shiny and New 安宇
Body: <p><a href="https://www.bricklink.com/catalogList.asp?catType=P&amp;catString=423" rel="noreferrer">Bricklink has a list of ancient bricks from the 50s that have slots in them.</a> What was the purpose of the slot? Its positioning on various pieces suggests that there was something specific you were supposed to put there &mdash; a window, maybe?</p>
  
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Tags: <piece-information><history>
Title: What was the slot for in the 1950's slotted bricks?
UserDisplayName: Mr. Shiny and New 安宇
ThreadText: # What was the slot for in the 1950's slotted bricks?
  
  (Asked by: username_0 on 2014-11-26)
  
  [Bricklink has a list of ancient bricks from the 50s that have slots in them.](https://www.bricklink.com/catalogList.asp?catType=P&catString=423) What was the purpose of the slot? Its positioning on various pieces suggests that there was something specific you were supposed to put there — a window, maybe?
  
  ![](https://www.bricklink.com/PL/bslot03bL.jpg?0)
  
  **Tags:** piece-information, history
  
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  ## 1 answers
  
  ### Answer by username_0 on 2014-11-26. Score: 7 | Accepted answer
  
  Oh, I should have read further down the page. There were special panes of "glass" in frames that fit the slots.
  
  [![](https://www.bricklink.com/PL/bwindow02.jpg?0)](https://www.bricklink.com/catalogItem.asp?P=bwindow02)
  
  
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