diff --git a/src/mame/drivers/glass.c b/src/mame/drivers/glass.c
index 806005c528b..5f8a0ca280c 100644
--- a/src/mame/drivers/glass.c
+++ b/src/mame/drivers/glass.c
@@ -218,10 +218,10 @@ static MACHINE_DRIVER_START( glass )
 	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
 MACHINE_DRIVER_END
 
-ROM_START( glass )
+ROM_START( glass ) /* Version 1.1 */
 	ROM_REGION( 0x080000, "maincpu", 0 )	/* 68000 code */
-	ROM_LOAD16_BYTE( "1.c23",	0x000000, 0x040000, CRC(aeebd4ed) SHA1(04759dc146dff0fc74b78d70e79dfaebe68328f9) )
-	ROM_LOAD16_BYTE( "2.c22",	0x000001, 0x040000, CRC(165e2e01) SHA1(180a2e2b5151f2321d85ac23eff7fbc9f52023a5) )
+	ROM_LOAD16_BYTE( "1.c23", 0x000000, 0x040000, CRC(aeebd4ed) SHA1(04759dc146dff0fc74b78d70e79dfaebe68328f9) )
+	ROM_LOAD16_BYTE( "2.c22", 0x000001, 0x040000, CRC(165e2e01) SHA1(180a2e2b5151f2321d85ac23eff7fbc9f52023a5) )
 
 	ROM_REGION( 0x400000, "gfx1", ROMREGION_DISPOSE )	/* Graphics */
 	/* 0x000000-0x3fffff filled in later in the DRIVER_INIT */
@@ -234,15 +234,15 @@ ROM_START( glass )
 	ROM_LOAD( "h9.bin", 0x000000, 0x100000, CRC(b9492557) SHA1(3f5c0d696d65e1cd492763dfa749c813dd56a9bf) )
 
 	ROM_REGION( 0x140000, "oki", 0 )	/* ADPCM samples - sound chip is OKIM6295 */
-	ROM_LOAD( "c1.bin",	 0x000000, 0x100000, CRC(d9f075a2) SHA1(31a7a677861f39d512e9d1f51925c689e481159a) )
+	ROM_LOAD( "c1.bin", 0x000000, 0x100000, CRC(d9f075a2) SHA1(31a7a677861f39d512e9d1f51925c689e481159a) )
 	/* 0x00000-0x2ffff is fixed, 0x30000-0x3ffff is bank switched from all the ROMs */
-	ROM_RELOAD(				0x040000, 0x100000 )
+	ROM_RELOAD(         0x040000, 0x100000 )
 ROM_END
 
-ROM_START( glass10 )
+ROM_START( glass10 ) /* Version 1.0 */
 	ROM_REGION( 0x080000, "maincpu", 0 )	/* 68000 code */
-	ROM_LOAD16_BYTE( "c23.bin",	0x000000, 0x040000, CRC(688cdf33) SHA1(b59dcc3fc15f72037692b745927b110e97d8282e) )
-	ROM_LOAD16_BYTE( "c22.bin",	0x000001, 0x040000, CRC(ab17c992) SHA1(1509b5b4bbfb4e022e0ab6fbbc0ffc070adfa531) )
+	ROM_LOAD16_BYTE( "c23.bin", 0x000000, 0x040000, CRC(688cdf33) SHA1(b59dcc3fc15f72037692b745927b110e97d8282e) )
+	ROM_LOAD16_BYTE( "c22.bin", 0x000001, 0x040000, CRC(ab17c992) SHA1(1509b5b4bbfb4e022e0ab6fbbc0ffc070adfa531) )
 
 	ROM_REGION( 0x400000, "gfx1", ROMREGION_DISPOSE )	/* Graphics */
 	/* 0x000000-0x3fffff filled in later in the DRIVER_INIT */
@@ -255,16 +255,15 @@ ROM_START( glass10 )
 	ROM_LOAD( "h9.bin", 0x000000, 0x100000, CRC(b9492557) SHA1(3f5c0d696d65e1cd492763dfa749c813dd56a9bf) )
 
 	ROM_REGION( 0x140000, "oki", 0 )	/* ADPCM samples - sound chip is OKIM6295 */
-	ROM_LOAD( "c1.bin",	 0x000000, 0x100000, CRC(d9f075a2) SHA1(31a7a677861f39d512e9d1f51925c689e481159a) )
+	ROM_LOAD( "c1.bin", 0x000000, 0x100000, CRC(d9f075a2) SHA1(31a7a677861f39d512e9d1f51925c689e481159a) )
 	/* 0x00000-0x2ffff is fixed, 0x30000-0x3ffff is bank switched from all the ROMs */
-	ROM_RELOAD(				0x040000, 0x100000 )
+	ROM_RELOAD(         0x040000, 0x100000 )
 ROM_END
 
-ROM_START( glass10a )
+ROM_START( glassbrk ) /* Title screen shows "GLASS" and under that "Break Edition" on a real PCB */
 	ROM_REGION( 0x080000, "maincpu", 0 )	/* 68000 code */
-	ROM_LOAD16_BYTE( "gl.c23",	0x000000, 0x040000, CRC(c1393bea) SHA1(a5f877ba38305a7b49fa3c96b9344cbf71e8c9ef
-) )
-	ROM_LOAD16_BYTE( "gl.c22",	0x000001, 0x040000, CRC(0d6fa33e) SHA1(37e9258ef7e108d034c80abc8e5e5ab6dacf0a61) )
+	ROM_LOAD16_BYTE( "spl-c23.bin", 0x000000, 0x040000, CRC(c1393bea) SHA1(a5f877ba38305a7b49fa3c96b9344cbf71e8c9ef) )
+	ROM_LOAD16_BYTE( "spl-c22.bin", 0x000001, 0x040000, CRC(0d6fa33e) SHA1(37e9258ef7e108d034c80abc8e5e5ab6dacf0a61) )
 
 	ROM_REGION( 0x400000, "gfx1", ROMREGION_DISPOSE )	/* Graphics */
 	/* 0x000000-0x3fffff filled in later in the DRIVER_INIT */
@@ -277,9 +276,9 @@ ROM_START( glass10a )
 	ROM_LOAD( "h9.bin", 0x000000, 0x100000, CRC(b9492557) SHA1(3f5c0d696d65e1cd492763dfa749c813dd56a9bf) )
 
 	ROM_REGION( 0x140000, "oki", 0 )	/* ADPCM samples - sound chip is OKIM6295 */
-	ROM_LOAD( "c1.bin",	 0x000000, 0x100000, CRC(d9f075a2) SHA1(31a7a677861f39d512e9d1f51925c689e481159a) )
+	ROM_LOAD( "c1.bin", 0x000000, 0x100000, CRC(d9f075a2) SHA1(31a7a677861f39d512e9d1f51925c689e481159a) )
 	/* 0x00000-0x2ffff is fixed, 0x30000-0x3ffff is bank switched from all the ROMs */
-	ROM_RELOAD(				0x040000, 0x100000 )
+	ROM_RELOAD(         0x040000, 0x100000 )
 ROM_END
 
 /***************************************************************************
@@ -326,6 +325,6 @@ static DRIVER_INIT( glass )
 	glass_ROM16_split_gfx(machine, "gfx2", "gfx1", 0x0200000, 0x0200000, 0x0200000, 0x0300000);
 }
 
-GAME( 1993, glass,    0,     glass, glass, glass, ROT0, "Gaelco", "Glass (Ver 1.1)",        GAME_UNEMULATED_PROTECTION | GAME_NOT_WORKING )
-GAME( 1993, glass10,  glass, glass, glass, glass, ROT0, "Gaelco", "Glass (Ver 1.0, set 1)", GAME_UNEMULATED_PROTECTION | GAME_NOT_WORKING )
-GAME( 1993, glass10a, glass, glass, glass, glass, ROT0, "Gaelco", "Glass (Ver 1.0, set 2)", GAME_UNEMULATED_PROTECTION | GAME_NOT_WORKING )
+GAME( 1993, glass,    0,     glass, glass, glass, ROT0, "Gaelco", "Glass (Ver 1.1)",                GAME_UNEMULATED_PROTECTION | GAME_NOT_WORKING )
+GAME( 1993, glass10,  glass, glass, glass, glass, ROT0, "Gaelco", "Glass (Ver 1.0)",                GAME_UNEMULATED_PROTECTION | GAME_NOT_WORKING )
+GAME( 1993, glassbrk, glass, glass, glass, glass, ROT0, "Gaelco", "Glass (Ver 1.0, Break Edition)", GAME_UNEMULATED_PROTECTION | GAME_NOT_WORKING )
diff --git a/src/mame/mamedriv.c b/src/mame/mamedriv.c
index b8393e8f57d..afbf1a14794 100644
--- a/src/mame/mamedriv.c
+++ b/src/mame/mamedriv.c
@@ -7242,7 +7242,7 @@ BOMULEUL CHAJARA SEGA ST-V  1997/04/11
 	DRIVER( wrallyb )	/* (c) 1993 - Ref 930217 */
 	DRIVER( glass )		/* (c) 1993 - Ref 931021 */
 	DRIVER( glass10 )	/* (c) 1993 - Ref 931021 */
-	DRIVER( glass10a )	/* (c) 1993 - Ref 931021 */
+	DRIVER( glassbrk )	/* (c) 1993 - Ref 931021 shows "Break Edition" on a real PCB */
 	DRIVER( targeth )	/* (c) 1994 - Ref 940531 */
 	DRIVER( thoop2 )	/* (c) 1994 - Ref ??? */
 	DRIVER( aligator )	/* (c) 1994 - Ref 940411 */