diff --git a/server/web3dbspider/metadata/FounderTag.js b/server/web3dbspider/metadata/FounderTag.js
index 1b6a3a1..08b3445 100644
--- a/server/web3dbspider/metadata/FounderTag.js
+++ b/server/web3dbspider/metadata/FounderTag.js
@@ -7,6 +7,37 @@ const factory = require('./factory');
 
 class FounderTag extends basewrap.BaseWrap {
 
+  #quality = 1
+
+  _init0 () {
+    switch (this.rarity) {
+    case 'Common':
+      {
+        this.#quality = 1;
+      }
+      break;
+    case 'Rare':
+      {
+        this.#quality = 2;
+      }
+      break;
+    case 'Legendary':
+      {
+        this.#quality = 3;
+      }
+      break;
+    default:
+      {
+        assert(false, 'unknow rarity');
+      }
+      break;
+    }
+  }
+
+  getQuality() {
+    return this.#quality;
+  }
+
 }
 
 module.exports = FounderTag;