Hi gents,
I reckon Ernest is right that it is being towed before final fitting out. Some details such as the armament haven't yet been added. The two dark rectangles. I guess they are panels of some sort that haven't been fitted yet. Or they have been left off to allow access to something behind it.
TRM, nice choice on U 69. The Germans sometimes numbered their boats out of sequnce with the express intention of disguising numbers of boat built from the enemy. For U-numbers, U 552 was built before U 253, while U 99 was built before U 74 etc. They did something similar pre-war. They painted the big white number "26" on the tower U 35 rather than 35. This was done almost certainly on purpose to confuse other nations.
I think U 69 was the 9th VIIC launched. The first VIICs launched were - U 93, 94, 95, 96, 97, 98, 551, 552, and then U 69.
Have you decided on a time period you are modelling U 69? This is necessary as different features were added at different times. You don't need an exact date or anything but if you can decide to depict on a certain patrol or even a rough time period then this helps regarding modifications and colour schemes.
Cheers,
Dougie