KEETMANSHOOP 20.3.00, forerunner letter with 25 Pfennig yellowish orange mixed franking with 3 Pfennig (5) grey-brown (1897 overprint issue) on magnificent registered letter from Keetmanshoop to Neustettin, arrival 29.4.00. Commercial use of 25 Pfennig stamp as overprinted 25 Pfennig not issued in Keetmanshoop until June 1900. Particularly interesting in every respect, expertised Jäschke-Lantelme BPP