It's just lighting and focus. When I shot my GP 1945 being attacked by an orchid last week the lugs all looked like a different length. They're not. Just lighting and angles. ...
But that picture is modified from original form ,half left of the insert is clearly looking like ceramic insert ,nothing corespondent to an aluminum bezel ,the thickness of the numbers,and you have three zeros on the right to compare ,the spacing,you can ...
The 30 is out of focus due to depth of field and looks larger due to the light and the flare. It's all about angles and lighting. Here's a different shot of the watch and the number look bigger on the left than the right. ...