I took my Amphicar for its first swim today.
Bought in March after years of looking (on & off) - studiously working all weekends since.
Other than on Youtube.....I hadn't seen one on the water before.
No leaks to speak off. Fair bit of heat in the engine bay, but I've done a "search" and I'll utilise many of the suggested enhancements.
I've attached some photos (Perth, Western Australia)