Many special trains of SWR has became permanent after running for more than a year.
Some of the Past Special trains of SWR that had a running period of T>=oneyear.
1)0201/02 YPR-Guwahati Weekly Exp(now 15901 YPR-Dibrugarh weekly Exp).
2)0803/04 MYS-Howrah weekly exp(now 22818 MYS-Howrah weekly exp)
3)0686/87...
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MYS-Chennai weekly overnight exp(now 22681 MYS-Chennai weekly exp)
4)0643/44 Bangalore-Ernakulam weekly exp(now 22608 Bangalore-Ernakulam weekly exp)
5)2295A/96A Bangalore-Patna weekly special (now increse in freq of Sangamitra exp fm 6 days to daily)
6)2777A/78A Hubli-Kochuveli weekly exp(now 12777 Hubli-Kochuveli weekly exp)
7)06201/02 Mys-Shiridi Special (now 16217 Mys-SNSI Exp)
8)05025/06 YPR-Gorakhpur Special (now 15024 Ypr-Gorakhpur exp)
9)08469/70 SBC-Puri garibrath special(now 22884 YPR-Puri garibrath exp)
10)06541/42 Sbc-Nagercoil Exp(now 16537 SBC-Nagercoil weekly exp)
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1)07313/14 Hubli-Chennai Triweekly special(Increase in freq of 17313/14 Hubli-chennai weekly to 4 days a week)
2)01035/36 MYS-Renigunta weekly exp(11035/36 MYS-Renigunta weekly exp)
3)06511/12 YPR-Jaipur Garibrath exp(16511/12 YPR-Jaipur Garibrath exp)
4)06517/18 YPR-Miraj Triweekly exp(16517/18 YPR-Miraj Triweekly exp)
5)06543/44 Yesvantpur-Ernakulam weekly exp(16543/44 Yesvantpur-Ernakulam weekly)
6)06919/20 Hubli-Bijapur Passenger(16919/201Hubli-Bijapur Passenger)
7)06513/14 Bangalore-Patna weekly exp(16513/14 Bangalore-Patna weekly exp)
8)08636 YPR-Hatia weekly exp(128XX/XY YPR-HATIA weekly exp)
Unfortunately 0669/70 Bangalore-Tiruchirappalli exp ran as a special for almost one year but it couldn't got regularised. But due to the diversion of newly announced SBC-NAGERCOIL exp diverted via salem,karur,namakkal (firstly announced route was via madurai,tiruchy)again lot of chances are there for this train again to regain its form.