Here’s my take... I’ll have more later. As a new engineer, I figured taking a picture with my grandpa’s slide rules was an appropriate setting for an old 321 chrono 😀
@Mauzer's photo reminded me of this I took a couple of years ago. iphone thru a hand-held magnifying glass taken in artificial light (reflection of desk lamp visible). The hard part was trying to bring out the dial colour. Thought it turned out ok for the basic kit.