Dellorto DHLA 40F carbs. Emission type model. Early ones.
Fixed air bleed size 2.2mm

Dellorto DHLA 40, 3 progression holes carbs.
Matched pair.
Serial numbers:

5228 A
105260401009
15883

5227 P
105260401109
15411

Dellorto DHLA jetting example:

Choke 30
Main jet 120
Air corrector 200
Emulsion tube 7772.5
Idle jet 48
Idle jet holder 7850.1
3 progression holes
Pump jet 33
Starter Jet 70

Dellorto DHLA 40E, 5 progression holes. Universal performance (non emission).

Type DHLA 40E is used on all Lotus Twin cam European ECE 15 engines (1558cc, big valve, D-type cam).
This is original technical data:

Choke 33mm
Main jet 135
Main air corrector 200
Accelerator pump jet 35
Idle jet 47L
idle-jet holder 7850.1
Starter jet 70
Needle valve 150.33
Aux. venturi 7848.2
float levels(mm) 16.5-17

Dellorto DHLA 40C carburettor pictures. Universal performance.
6 progression holes.
Aux. venturi 7848.1

Latest model of Dellorto DHLA 40 carbs.

Weber 48 DCO/SP carburettors pictures.