I was asked about some information about a Rail Howitzer captured during the German Spring Offensive in April 1918.

Source: Deutsches Hisorisches Museum

The gun was captured near Erquingehm-Lys where the British had built a rail spur to fire railway artillery. 

In April 1918, the Germans launched Operation Georgette quickly pushing the British back, capturing the 12 inch Railway Howitzer, named the First Consol at Erquninhem-Lys near Armentieres. The First Consol was one of six 12inch howitzers captured during the German Spring Offensives and according to my correspondent was sent to the Krupp Factory in Germany.