| 2022-08-07 | Old lab burners |
| 2015-03-29 | Old lab burners |
| 2014-03-30 | Old lab burners |
| 2013-06-21 | Old lab burners |
| 2012-07-12 | Old lab burners |
| 2010-07-27 | Lab burners of old |
| 2008-01-26 | Old lab items akin to Bunsen burners |
| 2007-09-02 | Old lab burners |
| 2005-02-27 | Old lab burners |
| 2004-03-06 | Old liquid heaters |
| 2003-10-15 | Lab burners |
| 2003-08-15 | Old flask heaters |
| 2002-03-26 | Old lab heaters |
| 2001-05-26 | Old science lab equipment |
| 2001-05-15 | Lab heaters |
| 2000-12-08 | Alcohol burners |
| 1999-07-24 | Lab equipment |
| 1999-02-14 | Small heaters |
| 1998-01-18 | Cone-shaped heaters |
| 1997-11-30 | Old-fashioned heating devices |
| 1997-08-07 | Cone-shaped heaters |
| 1995-05-15 | Lab burners |
| 1995-02-26 | Lab burners |
| 1995-01-12 | Lab heaters |
| 1994-11-28 | Lab burners |
| 1994-04-02 | Lab burners |