← Back to Trumpet Studio 💡 Tip: Press Ctrl + Enter to post. Enter adds a new line.

Was Callet a visionary?

Was Callet a visionary—or did he change systems just to sell new ones?
💡 Tip: Press Ctrl + Enter to post your reply. Press Enter for a new line.

💡 Tip: Press Ctrl + Enter to post. Enter adds a new line.