Microstar had a second system of naming boards beside the MS-5xxx and MS-6xxx. It is probably genuine retail Microstar.
MS-5148 TX2 430tx ATX
MS-5149 TR10
MS-5153 TX3
MS-5156 TX4 430tx
MS-5158 TX5 430tx
MS-5164 AL7 Ali Alladin IV+
MS-5168 SI19 SiS 5591/5595
MS-5169 AL9 Ali Alladin V+
MS-5169 - Rev 2
MS-5169 - Rev 3
MS-5170 TX9 430tx
MS-5182 Micro ATX
MS-6108 NA5 / B-AT 1.0 Intel 430 FX
MS-6109 NA6 / ATX 1.0 Intel 430 FX
MS-6110 NA7 / ATX 1.0 Intel 430 FX
MS-6111
MS-6114 LX4 Dual PII LX
MS-6117 LX6
MS-6119 BX2
MS-6120 Dual PII BX
MS-6140 Micro ATX PII
MS-6156BX BX7
MS-6156VA
MS-6167 IR1 Athlon ATX
MS-6167 Athlon ATX (spec sheet)
MS-6309 VA5