diff --git a/namco/identifiers.md b/namco/identifiers.md
index 40108da..838d735 100644
--- a/namco/identifiers.md
+++ b/namco/identifiers.md
@@ -1,4 +1,4 @@
-# NAMCO identifiers.
+# NAMCO identifiers
 
 This file describes the various identifiers and their formats that are used in products by NAMCO.
 
@@ -7,15 +7,17 @@ This file describes the various identifiers and their formats that are used in p
 ### Region code
 
 * `1`: JPN
-* `2`: USA?
-* `3`: EXP/ASIA?
-* `5`: CHN
+* `2`: ASIA / 一般海外 ASIA
+* `3`: EXP / EXP、NAI
+* `4`: CHINA (https://www.ebay.co.uk/itm/165005792426?mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338722076&toolid=10001)
+* `5`: CHINA
 * `6`: 
 
 ### Cabinet role
 
 * `LM`: live monitor?
 * `NA`: normal?
+* `ST`: station?
 * `TM`: terminal?
 * `TW`: medal/card game?
 
@@ -39,7 +41,7 @@ Components:
 
 Formats:
 - `$g$v-$u`
-  * Used in System 256 case, HDD
+  * Used in System 256 case & HDD
   * Examples:
     - `TSF1-HA`: game code TSF, version 1, $u HA
 - `$g$v$a$b$l-$c-$r`
@@ -47,13 +49,15 @@ Formats:
   * Examples:
     - `TSF1002-NA-A`: game code TSF, version 1, $a 0, $b 0, locale 2?, cabinet role normal, revision A
 - `$g$v$a$b$l-$c-$t-$r`
-  * Used in System N2
+  * Used in early System N2
   * Examples:
     - `WM31003-NA-HDD0-A`: game code WM3, version 1, $a 0, $b 0, locale Export, cabinet role normal, type HDD, revision A
 - `$g$v$a$b-$l-$c-$t-$r`
-  * Used in System 369, ES1, ES2, ES2+, ES3, ES4
+  * Used in System 369, late N2, ES1, ES2, ES2+, ES3, ES4
   * Examples:
-    - `TG2100-2-LM-HDD0-A`: game code TG2, version 1, $a 0, $b 0, locale US, cabinet role live monitor, type hard drive, revision A
+    - `W3P100-2-NA-DAT0-A`: game code W3P, version 1, $a 0, $b 0, locale Asia, cabinet role standard, type data, revision A
+    - `TTT103-3-ST-DAT0-A`: game code TTT, version 1, $a 0, $b 3, locale Export, cabinet role station, type data, revision A
+    - `TG2100-2-LM-HDD0-A`: game code TG2, version 1, $a 0, $b 0, locale Asia, cabinet role live monitor, type hard drive, revision A
     - `PBN100-1-NA-MPRO-A`: game code PBN, version 1, $a 0, $b 0, locale Japan, cabinet role normal, type M production, revision A
     - `GCB100-1-TW-MPRO-B`: game code GCB, version 1, $a 0, $b 0, locale Japan, cabinet role TW, type M production, revision B
     - `GKE300-1-TM-DAT0-A`: game code GKE, version 3, $a 0, $b 0, locale Japan, cabinet role terminal, type data, revision A
@@ -61,20 +65,21 @@ Formats:
 ## Dongle serial
 
 Components:
-- `$d`: drawing code, `[0-9]{4}`
+- `$g`: game code, `[0-9]{4}`
 - `$r`: [region code](#region-code), `[0-9]`
-- `$a`: account code, `[0-9]`
+- `$d`: dongle type, `[0-9]`
 - `$t`: title code, `[0-9]{2}`
 - `$n`: serial number, `[0-9]{4}`
 
 Formats:
 - `a$d$r$a $t$na`
   * Examples:
-    - `a274811 260532a`: drawing 2748, region Japan, account 1, title 26, serial number 0532
-    - `a2793 13393143a`: drawing 2793, region Japan, account 3, title 39, serial number 3143
+    - `a274811 260532a`: game #2748, region Japan, type 1, title 26, serial number 0532
+    - `a2793 13393143a`: game #2793, region Japan, type 3, title 39, serial number 3143
 
 Unknowns:
 - System 256 dongle (memory card): `a 026161 351019 a`
+- System N2 W3X (Asia) dongle: `a 026441 275842 a`
 
 ## Net ID