Historical clue formulations

• German industrial region — 2019-11-24
• German coal district — 2018-05-29
• Coal-rich German region — 2016-10-25
• River across the French/German border — 2016-07-28
• River of western Germany — 2014-07-06
• Coal-rich area in Europe — 2013-01-08
• River across the French/German border — 2012-06-04
• Coal-rich region of Germany — 2012-02-14
• Mosel tributary — 2012-01-27
• Coal-rich valley — 2011-10-14
• River of Germany — 2009-12-25
• Moselle tributary — 2008-06-03
• Coal-rich German region — 2006-09-12
• Coal area — 2005-09-08
• German/French river — 2004-01-11
• European coal area — 2002-09-06
• German industrial region — 2002-07-23
• ___ Basin, German coal region — 2001-05-29
• Moselle tributary — 1999-07-25
• River to the Mosel — 1999-05-13
• Coal-rich German region — 1999-04-27
• Germany's ___ Valley — 1998-12-07
• German coal-producing region — 1998-11-01
• River from the Vosges Mountains — 1998-06-27
• Coal-rich European region — 1997-07-01
• Mosel tributary — 1996-12-07
• Coal-rich area in Europe — 1996-09-17
• Moselle tributary — 1996-09-04
• River to the Moselle — 1996-06-30
• Mosel feeder — 1994-08-07
• German coal region — 1994-04-19
• Region of heavy W.W. II fighting — 1994-03-15
• German coal region — 1994-01-19
• German river — 1993-12-31