The under BB and under chain stay cable guides together with braze-on mounts for the bottle cage are later features; the band-on top tube cable guides early ones.
The directly mounted front derailleur and shifters (can't see a mount, but I may be wrong) are, I guess, early attempts to improve upon band-on mounts, before the braze-ons were standardized.
For the price, they could have replaced the rear derailleur cable though...
The under BB and under chain stay cable guides together with braze-on mounts for the bottle cage are later features; the band-on top tube cable guides early ones.
The directly mounted front derailleur and shifters (can't see a mount, but I may be wrong) are, I guess, early attempts to improve upon band-on mounts, before the braze-ons were standardized.
For the price, they could have replaced the rear derailleur cable though...