Tim Cook will take his Apple Watch secret to the grave

Tim Cook has a secret about the Apple Watch, and he's not any closer to telling us.
Apple's latest quarterly earnings report for Q2 2017 was yet another big showing for the company, and CEO Tim Cook was, as always, pleasant and positive on the publicly-streamed conference call disclosing the financials. 
But yet again, he left us hanging when it came to the Apple Watch's exact sales numbers. Instead, he boasted that the sales of the smartwatch "doubled" from last year and lumped the wearabl