**Table 1:** Basic parameters. Identifications: FLAMES targets ("NGC330'' and "NGC346'') from Evans et al. (2006), "MPG'' from Massey et al. (1989), "AzV'' from Azzopardi & Vigneau (1975,1982) and "Sk'' from Sanduleak (1968). Photometric data for the FLAMES targets is from Momany et al. (2001); for objects with a primary AzV identification these are from Massey (2002) and Massey et al. (2004). Spectral types of the FLAMES targets are from Evans et al. (2006). For convenience previously published spectral types are also given. Sources of these classifications are W77 (Walborn 1977); NMC (Niemela et al. 1986); G87 (Garmany et al. 1987); MPG (Massey et al. 1989); W00 (Walborn et al. 2000); EH04 (Evans et al. 2004b). Spectral types for the field O-type stars were taken from the catalogues of Garmany et al. (1987) and Walborn et al. (2002). Wind velocities given without brackets are from Prinja & Crowther (1998); Evans et al. (2004a); Haser et al. (1998); Garmany & Fitzpatrick (1988); Massey et al. (2004); Crowther et al. (2002); Bouret et al. (2003); Evans et al. (2004c). Values between brackets are calculated from the escape velocity at the stellar surface.
Primary ID	Cross-IDs			Spectral	Published	V	$A_{\rm V}$	M_V	$v_{\infty }$
	MPG	AzV	Sk	Type	ST				[km s^-1]
NGC 346-001^a	MPG 789	AzV 232	Sk 80	O7 Iaf+	O7 Iaf+ [W77]	12.31	0.40	-6.99	1330
					O7 If [MPG]
NGC 346-007^a	MPG 324	...	...	O4 V((f+))	O4-5 V [NMC]	14.07	0.12	-4.95	2300
					O4 V((f)) [MPG]
					O4 ((f)) [W00]
NGC 346-010	...	AzV 226	...	O7 IIIn((f))	O7 III [G87]	14.37	0.31	-4.84	[1832]
NGC 346-012	...	AzV 202	...	B1 Ib	B1 III [G87]	14.39	0.09	-4.60	[1568]
NGC 346-018	MPG 217	...	...	O9.5 IIIe	...	14.78	0.56	-4.68	[1481]
NGC 346-022	MPG 682	...	...	O9 V	O8 V [MPG]	14.91	0.16	-4.14	[3305]
NGC 346-025^a	MPG 848	...	...	O9 V	O8.5 V [MPG]	14.95	0.12	-4.07	[2816]
NGC 346-026	MPG 12	...	...	B0 IV	O9.5 V [MPG]	14.98	0.50	-4.42	[2210]
					O9.5-B0 V (N str) [W00]
					O9.5 III [EH04]
NGC 346-028	MPG 113	...	...	OC6 Vz	O6 V [MPG]	15.01	0.19	-4.08	[2369]
					OC6 Vz [W00]^b
NGC 346-031	...	...	...	O8 Vz	...	15.02	0.16	-4.04	[2461]
NGC 346-033	MPG 593	...	...	O8 V	...	15.07	0.19	-4.02	[4102]
NGC 346-046	...	...	...	O7 Vn	...	15.44	0.12	-3.58	[2723]
NGC 346-050	MPG 299	...	...	O8 Vn	O9 V [MPG]	15.50	0.03	-3.43	[2661]
NGC 346-051	MPG 523	...	...	O7 Vz	O7 V+neb [MPG]	15.51	0.16	-3.54	[3233]
NGC 346-066	MPG 213	...	...	O9.5 V	...	15.75	0.16	-3.30	[2931]
NGC 346-077	MPG 238	...	...	O9 V	B0: [MPG]	15.88	0.40	-3.42	[2205]
NGC 346-090	...	...	...	O9.5 V	...	15.96	0.37	-3.31	[2978]
NGC 346-093	MPG 304	...	...	B0 V	...	16.01	0.34	-3.23	[3516]
NGC 346-097	MPG 519	...	...	O9 V	...	16.06	0.74	-3.58	[4004]
NGC 346-107	MPG 559	...	...	O9.5 V	...	16.20	0.09	-2.79	[2547]
NGC 346-112	MPG 327	...	...	O9.5 V	...	16.24	0.19	-2.85	[2368]
NGC 330-013	...	AzV 186	...	O8.5 II-III((f))	O7 III [G87]	14.00	0.56	-5.46	1600
					O8 III((f)) [EH04]
NGC 330-052	...	...	...	O8.5 Vn	O8 V [EH04]	15.69	0.16	-3.36	[2005]
AzV 14	...	...	Sk 9	O5 V	...	13.55	0.47	-5.81	2000
AzV 15	...	...	Sk 10	O7 II	...	13.12	0.40	-6.18	2125
AzV 26	...	...	Sk 18	O7 III	...	12.46	0.47	-6.90	2150
AzV 95	...	...	...	O7 III	...	13.78	0.43	-5.55	1700
AzV 243	...	...	Sk 84	O6 V	...	13.84	0.47	-5.53	2125
AzV 372	...	...	Sk 116	O9 Iabw	...	12.59	0.50	-6.81	1550
AzV 388	...	...	...	O4 V	...	14.09	0.34	-5.15	1935
AzV 469	...	...	Sk 148	O8.5 II((f))	...	13.12	0.47	-6.25	1550

^a Binary; ^b The source of the type adopted here.

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