All of these coins are tin.  Questions concerning their authenticity have been resolved.  Steve Album says they're good, and that's all I need to know.

MALACCA, Muzaffar, 1446-59, tin pitis, SS-1, ND, F $36.00 sold 9/27/2010, ask me if I have more of these
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MALACCA,Governor issue, 1511-15, tin bastardo, S-M.05, cross / armillary sphere, 38mm dia., 7mm thick, 49.4g, warped flan, normal pimpled surface, VF $300.00 sold
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MALACCA,Joao III, 1521-57,tin bastardo, S-J3.04, arms / armillary sphere, F $63.00
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MALACCA,Joao III, 1521-57,tin soldo, S-J3.06, cross / armillary sphere, Lisboa mint, XF $95.00
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MALACCA,Joao III, 1521-57, tin soldo, S-J3.07, ND cross / armillary sphere, Lisboa mint,  F+ $40.00
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MALACCA,Joao III, 1521-57, tin dinheiro, S-J3.11, similar types, F $33.00
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MALACCA,Sebastiao, 1557-78, tin bastardo, S-S01, arms / S B divided by 3 crossed arrows, 32mm, Malacca mint, F $130.00
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MALACCA,Sebastiao, 1557-78, tin bastardo S-S03 ND  arms / S B divided by 3 crossed arrows, 27mm, Malacca mint, small natural hole at edge, VF $64.00
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MALACCA,Sebastiao, 1557-78, tin bastardo, S-S04, arms / S B divided by 3 arrows, big dot at junction, Malacca mint, VF $65.00
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MALACCA,Sebastiao, 1557-78, tin dinheiro, S-S15, ND, B-A flanking 3 arrows / armillary sphere, diagonal L-R, F+ $40.00
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MALACCA,Sebastiao, 1557-78, tin dinheiro, S-S16, ND, B-A flanking 3 arrows / armillary sphere, diagonal R-L, VG $40.00 sold
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MALACCA,Sebastiao, 1557-78, tin dinheiro, F $40.00
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MALACCA,c. 1598-1640, tin bazarucco, S-BZ.01, ND, arms / cross, F $33.00
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274-242. MALAYSIA, MALACCA, 15-16th c.?, Xing Yuan Tong Shi Yi?, 22.5mm tin, clear but very sketchy characters, F+ $25.00
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other Malaysian coins