| 12.12.1967 | Entered service named Tawarri. [rrc] |
| 23.9.1970 | Converted from independant to head-end power. [rrc] |
| 10.12.1986 | TIMS/WMS: passenger car "TAWA D" alteration complete: "remove retaining cup & glass clips and plate pegs from cupboards in conductor's compartment. 'overland' joint stock cars. (RS4172)". |
| 17.12.1986 | TIMS/WMS: passenger car "TAWA D" alteration complete: "apply check letter to class & number of approximately 443 locomotives, passenger cars and rail cars. Classify Overland sleeping cars. (RS4173)". |
| 1987 | Given the computer code "JTB-1". |
| 19.03.1987 | TIMS/WMS: passenger car "TAWA D" alteration complete: "installation of emergency key boxes to passenger cars. (RS4190)". |
| 20.08.1987 | TIMS/WMS: passenger car "TAWA D" alteration: "modify buffer beam on carbon and stainless steel passenger cars. (RS4215)". |
| 26.08.1987 | TIMS/WMS: passenger car "TAWA D" alteration: "modify air conditioning intake filters and frames (primary and secondary) on stainless steel and carbon steel passenger cars. (RS4213)". |
| 19.11.1987 | TIMS/WMS: passenger car "JTB 1 T" alteration complete: "delete all exterior "V & ANR" lettering from overland rollingstock. All Overland rollingstock. (RS4241)". |
| 21.06.1990 | TIMS/WMS: passenger car "JTB 1 T" alteration: "fit longer pin in passenger car jumper cable plugs. All passenger cars. (RS4518)". |
| 28.05.1991 | TIMS/WMS: passenger car "JTB 1 T" alteration: "replace existing exhaust chokes on 132 no. "Ghan" "Trans-Australian" "Overland", 'SS' & 'SSA' cars to improve train handling. All std cars to be fitted with exhaust chokes to wh p/no. 2483 & the 3 no. relay braked cars are to be fitted with wh p/no. c-12740 exhaust chokes . this modification will increase brake cylinder exhaust timings from 6-9 secs to 26-28 secs. (RS4603)". |
| 28.2.1996 | Converted from broad gauge to standard gauge. |
| 30.5.1997 | TIMS/WMS: shows passenger car "JTB 1 T" in AN "Mainland Division".| Owner: | "AN &V/LINE" | | Operator: | "C" | | Length Over Headstocks: | "22.9m" | | Tare Weight: | "47.8tonne" | | Current Gauge: | "Standard" | | Gauge Restrictions: | "S" | | Bogie Configuration: | "2X2" | | Original Cost: | "$77060" | | Run Restriction: | "Unrestricted on gauge(s) shown Inter or Intrastate" | | Diagram Book Page No.: | "CB P-3" | | Date Built: | "12.12.1967" | | Operating System: | "AN & V/LINE " | | Intended Use: | "Passengers" | | Remarks: | "Twinette;J.S. AN-V/L;Named "TAWARRI" | | BSG Code: | "PBMT" |
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| 1.11.1997 | Sold to Great Southern Railway. |
| 18.11.1998 | At Keswick painted grey with blue lettering and new style "Overland" logos. |
| 2002-03 | Sold to a third party and "Leased Back" by Great Southern Railway [Serco Group Report]. |