--- a/src/newgrf_industries.cpp	Tue Jun 17 10:32:49 2008 +0000
+++ b/src/newgrf_industries.cpp	Tue Jun 17 13:22:13 2008 +0000
@@ -265,6 +265,8 @@
 			return industry->founder | (is_ai ? 0x10000 : 0) | (colours << 24);
 		}
 
+		case 0x46: return industry->construction_date; // Date when built - long format - (in days)
+
 		/* Get industry ID at offset param */
 		case 0x60: return GetIndustryIDAtOffset(GetNearbyTile(parameter, industry->xy), industry);