The Sandstone Steam Railway Stock List has been updated. The new version amends the incorrect Hanomag works number for NGG13 number 49 from 10599 to 10598. Information via Andreas Giller at the Hanomag Museum in Germany and Garratt Bucher in the USA confirms that 10598 is the correct works number for number 49. The attached pic courtesy of Hanomag confirms the information.
Our documentation extending back some 20 years has always detailed number 49 as Hanomag 10599 but after all these years the correct information has emerged.