Answers.Body: <p>Before 2002 LEGO used "Duplo" inside studs. In 2002 they tried to drop the Duplo brand and possibly for this reason all new Duplo moulds have "LEGO" in the studs. Rare pieces like the 2x10 brick still use an older mould, so still have "Duplo" in the stud. Also from 2012 some sets at least in Europe have 2x4 bricks with "Duplo" in the studs. It's possible these are repaired old molds.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-03-22T17:43:08.470Z
Answers.LastActivityDate: 2015-03-22T22:12:47.863Z
Answers.LastEditDate: 2015-03-22T22:12:47.863Z
Answers.UserDisplayName: zg0
Answers.Body: <p>An example of 2 different moulds:
  <a href="https://i.sstatic.net/bBMQM.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/bBMQM.jpg" alt="enter image description here" /></a></p>
  <p>The inside (or underside) of the parts differ as well:
  <a href="https://i.sstatic.net/Jb3l5.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/Jb3l5.jpg" alt="enter image description here" /></a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2023-03-08T20:28:03.500Z
Answers.LastActivityDate: 2023-03-09T08:48:54.397Z
Answers.LastEditDate: 2023-03-09T08:48:54.397Z
Answers.UserDisplayName: Sergey I
Answers.Body: <p>There really isn't a "on" for the Duplo studs.  All Duplo studs are hollow studs.  In the interior of the stud, depending on set and the year of the piece, the stud will read:</p>
  
  <blockquote>
    <p>DUPLO</p>
  </blockquote>
  
  <p>or </p>
  
  <blockquote>
    <p>LEGO</p>
  </blockquote>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-03-05T22:47:30.087Z
Answers.LastActivityDate: 2015-03-05T22:47:30.087Z
Answers.UserDisplayName: Nick2253
Body: <p>Do all regular Duplo bricks have the word "Duplo" written on their studs? If not, what variations are there?</p>
  
Tags: <duplo>
Title: What logos appear on Duplo brick studs?
UserDisplayName: Kramii
ThreadText: # What logos appear on Duplo brick studs?
  
  (Asked by: username_0 on 2015-03-05)
  
  Do all regular Duplo bricks have the word "Duplo" written on their studs? If not, what variations are there?
  
  **Tags:** duplo
  
  ---
  
  ## 3 answers
  
  ### Answer by username_3 on 2015-03-05. Score: 9 | Accepted answer
  
  There really isn't a "on" for the Duplo studs. All Duplo studs are hollow studs. In the interior of the stud, depending on set and the year of the piece, the stud will read:
  
  > DUPLO
  
  or
  
  > LEGO
  
  
  ---
  
  ### Answer by username_1 on 2015-03-22. Score: 7
  
  Before 2002 LEGO used "Duplo" inside studs. In 2002 they tried to drop the Duplo brand and possibly for this reason all new Duplo moulds have "LEGO" in the studs. Rare pieces like the 2x10 brick still use an older mould, so still have "Duplo" in the stud. Also from 2012 some sets at least in Europe have 2x4 bricks with "Duplo" in the studs. It's possible these are repaired old molds.
  
  
  ---
  
  ### Answer by username_2 on 2023-03-08. Score: 5
  
  An example of 2 different moulds:
  [![enter image description here](https://i.sstatic.net/bBMQM.jpg)](https://i.sstatic.net/bBMQM.jpg)
  
  The inside (or underside) of the parts differ as well:
  [![enter image description here](https://i.sstatic.net/Jb3l5.jpg)](https://i.sstatic.net/Jb3l5.jpg)
  
  
  ---
  
  