Spitfire assembly numbers

1	Top centre main planes	51	Chassis front
2	Bottom centre main planes	52	Waterproof covers
3	Top inner main planes	53	Wireless
4	Bottom inner main planes	54	Service tank
5	Target towing gear	55	Fin top
6	Bottom inter main planes	56	Starter
7	Top outer main planes	57	Bomb gear
8	Bottom outer main planes	58	Towing gear
9	Top inner aileron	59	Brake gear
10	Bottom inner aileron	60	Tail plane wing tip skid
11	Top outer aileron	61	Deck landing gear
12	Bottom outer aileron	62	Armament
13	Extension	63	Oxygen apparatus
14	Wing tip, skid or float	64	Equipment
15	Struts & external bracing	65	Petrol tank, auxiliary
16	Fin or King Post	66	Tail adjusting gear
17	Top tail plane	67	Radiator, auxiliary
18	Bottom tail plane	68	Dive brakes
19	Top elevators	69	Folding flap, bottom
20	Bottom elevators	70	Hoisting gear
21	Centre (or top) fin	71	Anti-icing
22	Outer (or bottom) fins	72	Fighting top
23	Centre rudders	73	Oil tank, auxiliary
24	Outer rudders	74	Floats
25	Tail plane struts & external bracing	75	Seaplane chassis
26	Tail skid	76	Trailing portion, top centre
27	Main fuselage or hull	77	Trial installation general arrangement drawings
28	Nose fuselage or hull		Trial installation general arrangement drawings
29	Tail fuselage or hull	78	Trailing portion, top outer
30	Main fairing	79	Ground & servicing equipment
31	Nose fairing	80	Tail gunner’s nacelle
32	Tail fairing	81	Torpedo gear
33	Controls	82	Engine brakes
34	Dashboard & instruments	83	Models
35	Flooring & seating	84	Test specimens
36	Electrical equipment	85	Gun turret
37	Engine mounting	86	Cabin heating
38	Engine cowling	87	Hydraulic system
39	Engine controls	88	Pneumatic system
40	Exhaust system	89	Accelerator [catapult] gear
41	Radiator	90	[Reserved]
42	Radiator shutters	91	[Reserved]
43	[Reserved]	92	Mould loft lines
44	Petrol tanks	93	Cases for shipment
45	Petrol system	94	Packing for shipment
46	Oil tanks	95	Mock-up
47	Oil system	96	Hull erecting cradle
48	Water tanks	97	[Reserved]
49	Water system	98	Final erection
50	Chassis [undercarriage] – main	99	Trial flights
		100	Miscellaneous spares