Approval.

tl/marking_types.php

@@ -1,2 +1,23 @@
 <?PHP
 declare(strict_types = 1);
+$marking_types = array (
+  'signature' => 'Signature',
+  'watermark' => 'Watermark',
+  'engraving' => 'Engraving',
+  'scratch' => 'Scratching',
+  'stamp' => 'Stamped',
+  'overprint' => 'Overprint',
+  'embossing' => 'Embossing',
+  'handwritten' => 'Handwritten',
+  'glued' => 'Glued',
+  'embroidered' => 'Embroidered',
+  'sewn' => 'Sewn',
+  'screwed' => 'Screwed',
+  'burnt_in' => 'Burnt in',
+  'riveted' => 'Riveted',
+  'nailed' => 'Nailed',
+  'hallmarked' => 'Hallmarked',
+  'punched' => 'Punched',
+  'scarified' => 'Scarified',
+  'cast' => 'Cast',
+);