For the dad who truly has it all, consider gifts that marry rarity with...
https://spark-wiki.win/index.php/Noise-Cancelling_Headphones_Gift_%E2%80%93_Good_Idea_for_Frequent_Travelers
For the dad who truly has it all, consider gifts that marry rarity with quality—like a limited-run timepiece with fewer than 50 pieces made or a full-grain leather briefcase crafted from 1.5-2.0mm thick hide