diff --git a/src/mame/arcade.lst b/src/mame/arcade.lst
index d669dc6a4c9..0130d795b8b 100644
--- a/src/mame/arcade.lst
+++ b/src/mame/arcade.lst
@@ -980,6 +980,7 @@ xday2           // (c) 1995 (Japan)
 nebulray        // (c) 1994 (World)
 nebulrayj       // (c) 1994 (Japan)
 ptblank         // (c) 1994 (GN2 World)
+ptblanka        // (c) 1994 (GN2 World) - Alternate labels, NRx-SPR0 (X=1 to 9)
 gunbuletj       // (c) 1994 (GN1 Japan)
 gunbuletw       // (c) 1994 (GN3 World)
 gslugrsj        // (c) 1993 (Japan)
diff --git a/src/mame/drivers/namconb1.c b/src/mame/drivers/namconb1.c
index 867ae4418a5..d655bfc49d9 100644
--- a/src/mame/drivers/namconb1.c
+++ b/src/mame/drivers/namconb1.c
@@ -1204,6 +1204,36 @@ ROM_START( ptblank ) /* World set using 4Mb sound data rom (verified) */
 	ROM_LOAD( "eeprom", 0x0000, 0x0800, CRC(95760d0f) SHA1(94ac5a261d9afc77c2a163a50950b0e86b1f8041) )
 ROM_END
 
+ROM_START( ptblanka ) /* World set using non standard ROM labels (NR is Namco's prefix for Nebulas Ray, but NOT here!!), verified on 2 seperate PCBs */
+	ROM_REGION( 0x100000, "maincpu", 0 ) /* main program */
+	ROM_LOAD32_WORD( "nr3_spr0.15b", 0x00002, 0x80000, CRC(fe2d9425) SHA1(51b166a629cbb522720d63720558816b496b6b76) ) // == gn2_mprlb.15b
+	ROM_LOAD32_WORD( "nr2_spr0.13b", 0x00000, 0x80000, CRC(3bf4985a) SHA1(f559e0d5f55d23d886fe61bd7d5ca556acc7f87c) ) // == gn2_mprub.12b
+
+	ROM_REGION16_LE( 0x80000, "c75data", 0 ) /* sound data - JP1 jumper selectable between 1Mb (27C1024) or 4Mb (27C4096) */
+	ROM_LOAD( "nr1_spr0.5b", 0, 0x80000, CRC(a0bde3fb) SHA1(b5fac1d0339b1df6b8880fcd7aa2725a774765a4) ) /* same data as gn1_spr0.5b (CRC32 = 0x6836ba38) repeated 4 time */
+
+	ROM_REGION( 0x1000000, "c352", 0 ) // Samples
+	ROM_LOAD( "nr4_spr0.5j", 0, 0x200000, CRC(05477eb7) SHA1(f2eaacb5dbac06c37c56b9b131230c9cf6602221) ) // == gn1-voi0.5j
+
+	ROM_REGION( 0x800000, NAMCONB1_SPRITEGFXREGION, 0 )
+	ROM_LOAD16_BYTE( "gn1obj0l.ic1", 0x000001, 0x200000, CRC(06722dc8) SHA1(56fee4e17ed707fa6dbc6bad0d0281fc8cdf72d1) ) /* These four located on MEMEXT OBJ8 PCB daughter-card */
+	ROM_LOAD16_BYTE( "gn1obj0u.ic2", 0x000000, 0x200000, CRC(fcefc909) SHA1(48c19b6032096dd80777aa6d5eb5f90463095cbe) )
+	ROM_LOAD16_BYTE( "gn1obj1l.ic3", 0x400001, 0x200000, CRC(48468df7) SHA1(c5fb9082c84ac2ffceb6f5f4cbc1d40047c55e3d) )
+	ROM_LOAD16_BYTE( "gn1obj1u.ic4", 0x400000, 0x200000, CRC(3109a071) SHA1(4bb16df5a3aecdf37baf843edfc82952d46f5227) )
+
+	ROM_REGION( 0x400000, NAMCONB1_TILEGFXREGION, 0 )
+	ROM_LOAD( "nr5_spr0.8j",  0x000000, 0x100000, CRC(a5c61246) SHA1(d1d9f286b93b5b9880160029c53384d13c08dd8a) ) // == gn1_chr0.8j
+	ROM_LOAD( "nr6_spr0.9j",  0x100000, 0x100000, CRC(c8c59772) SHA1(91de633a300e3b25a919579eaada5549640ab6f0) ) // == gn1_chr1.8j
+	ROM_LOAD( "nr7_spr0.10j", 0x200000, 0x100000, CRC(dc96d999) SHA1(d006a401762b57fef6716f56eb3a7edcb3d3c00e) ) // == gn1_chr2.10j
+	ROM_LOAD( "nr8_spr0.11j", 0x300000, 0x100000, CRC(4352c308) SHA1(785c13df219dceac2f940519141665b630a29f86) ) // == gn1_chr3.11j
+
+	ROM_REGION( 0x80000, NAMCONB1_TILEMASKREGION, 0 )
+	ROM_LOAD( "nr9_spr0.5m", 0, 0x80000, CRC(86d4ff85) SHA1(a71056b2bcbba50c834fe28269ebda9719df354a) ) // == gn1-sha0.5m
+
+	ROM_REGION( 0x0800, "eeprom", 0 ) // default gun calibration and settings
+	ROM_LOAD( "eeprom", 0x0000, 0x0800, CRC(95760d0f) SHA1(94ac5a261d9afc77c2a163a50950b0e86b1f8041) )
+ROM_END
+
 ROM_START( gunbuletw ) /* World set using 4Mb sound data rom (verified) */
 	ROM_REGION( 0x100000, "maincpu", 0 ) /* main program */
 	ROM_LOAD32_WORD( "gn3_mprlb.15b", 0x00002, 0x80000, CRC(9260fce5) SHA1(064579be1ac90e04082a8b403c6adf35dbb46a7e) )
@@ -1932,7 +1962,8 @@ ROM_END
 
 GAME( 1994, nebulray, 0,        namconb1, namconb1, namconb1_state, nebulray, ROT90, "Namco", "Nebulas Ray (World, NR2)", MACHINE_IMPERFECT_SOUND )
 GAME( 1994, nebulrayj,nebulray, namconb1, namconb1, namconb1_state, nebulray, ROT90, "Namco", "Nebulas Ray (Japan, NR1)", MACHINE_IMPERFECT_SOUND )
-GAME( 1994, ptblank,  0,        namconb1, gunbulet, namconb1_state, gunbulet, ROT0,  "Namco", "Point Blank (World, GN2 Rev B)", MACHINE_IMPERFECT_SOUND )
+GAME( 1994, ptblank,  0,        namconb1, gunbulet, namconb1_state, gunbulet, ROT0,  "Namco", "Point Blank (World, GN2 Rev B, set 1)", MACHINE_IMPERFECT_SOUND )
+GAME( 1994, ptblanka,  0,       namconb1, gunbulet, namconb1_state, gunbulet, ROT0,  "Namco", "Point Blank (World, GN2 Rev B, set 2)", MACHINE_IMPERFECT_SOUND )
 GAME( 1994, gunbuletj,ptblank,  namconb1, gunbulet, namconb1_state, gunbulet, ROT0,  "Namco", "Gun Bullet (Japan, GN1)", MACHINE_IMPERFECT_SOUND )
 GAME( 1994, gunbuletw,ptblank,  namconb1, gunbulet, namconb1_state, gunbulet, ROT0,  "Namco", "Gun Bullet (World, GN3 Rev B)", MACHINE_IMPERFECT_SOUND )
 GAME( 1993, gslugrsj, 0,        namconb1, nbsports, namconb1_state, gslgr94u, ROT0,  "Namco", "Great Sluggers (Japan)", MACHINE_IMPERFECT_SOUND )