F-104G 20+53 JaboG 31 during a Beja deployment in August 1973

F-104G, construction number 683-2062, company model 683-10-19, built by Lockheed
manufactured by Group USA (ARGE-USA); Lockheed assembly in Fighterbomber version according contract lot 6
flight test release January 29, 1962; test flights with register number coded "162" only; acceptance date May 9, 1962 by BABwLockheed
KF+137 airlifted to Messerschmitt-Manching on May 15, 1962 with 14 flight hours in a Canadair CL-44D airfreighter of "Flying Tiger Line"; test flight by Messerschmitt on June 27, 1962
DA+129 JaboG 31 at Norvenich AB delivery date on August 23, 1962 in Silver-finish colors; project "Replace" was not implemented
project "19" upgrading in order to get all Norvenich aircraft to the same modification level starting in January 1963
renumbered DA+119 on February 28, 1963 after the upgrading (aircraft was changed to such an extent that it received a new tactical code)
IRAN at SABCA on March 3, 1966 with 483 flight hours, modification upgrading and camouflage scheme "Norm 62" according tech order "TA-196", back to JaboG 31 on November 8, 1966
NATO exercise "Tactical Weapons Meet" 1967 at RAFG Wildenrath in June 1967
20+53 withdrawn from use and stored at LVR 1 Manching on November 3, 1976 as attrition replacement aircraft
struck off charge order (AVA) October 29, 1981; used for spare parts (ETG:Ersatzteilgewinnung); scrapped.

copyright © Heribert Mennen

Project "19"
After completion of the "Replace" project, LAAO (Lockheed Advisory Office) personnel in Nörvenich inspected all Lockheed aircrafts to determine the modification status. 
It turned out that there was still no uniform configuration "2056D" achieved. According to the latest Lockheed construction documents, which apparently only the LAAO submitted, 
up to 60 SB's (Service Bulletins) were missing on the individual aircraft. There is an LAAO report from 14.10.1962.
It was therefore decided that the affected 19 F-104G should be retrofitted again by staff of Heinkel from Speyer at Nörvenich. 
With the instruction of the BWB FS 173/51315 of 30.10.1962 this action was initiated. But for the reasons already mentioned, this work could not begin until January 1963.
The following aircrafts were re-modified again: factory numbers: 2043, 2044, 2046 - 2049, 2053 - 2058, 2060 - 2066.

8 aircrafts were changed to such an extent that they received a new tactical code:
2049 - DA+253 to DA+232
2057 - DA+122 to DA+112
2058 - DA+254 to DA+234
2060 - DA+257 to DA+237
2061 - DA+258 to DA+240
2062 - DA+129 to DA+119
2063 - Da+259 to DA+239
2066 - DA+126 to DA+120

10 of these Project "19" aircraft took part in the "Category III" tests: 2043, 2044, 2046, 2047, 2048, 2053, 2054, 2055, 2056, 2057. "Category III" were tests of operational mission profiles and system tests from April until July 1963.