Yes, the engraving is "Leutn. vZiegesar". I can`t open the pin because ii is repaired. Joachim Von Ziegesar had served in FA 23 along with Veltjens and Berthold, and there is a photo that suggests he was Veltjens' observer for a time. After becoming a pilot he seems to have been another of Berthold's proteges and followed him (and Veltjens) from unit to unit. My limited sources have him in Jasta 4 from 1 Oct 1916 to the 16th, then in Jasta 14 until 15 March 1918, He was briefly in Jasta 18 but then was part of the big Berthold switch to Jasta 15 on 18 or 20 March 1918. He flew with Jasta 15 until the EOW. He had three (?) victories: 1. 6 June 1918 a DH9 at 1140 hrs at Maignelay Unconfirmed Sopwith on 9 August 1918, at 1830 hrs west of Le Quesnel 2. 26 Sept '18, a SPAD XIII at 1740 hrs at Pont-a-Mousson 3. 29 October '18 - a Breguet at Champigneulle The bavarian Pilot badge is a original i have a certificate.