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| - The open cluster Havlen-Moffat No. 1 revisited
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| - A deep CCD UBVRI photometric survey combined with UBVRI polarimetric observations of 21 bright stars was carried out in the region of the open cluster Havlen-Moffat No. 1. Our data reveal that the extinction law in this cluster is variable and that six cluster stars show very high polarisation values (>4% ), probably because of the presence of a nearby small dust cloud. The cluster is at a distance of $d = 3300$ pc, it is 2-4 Myr old and the initial mass function of its most massive stars ( ${\cal M} > 3 {\cal M_{\sun}}$) has a flat slope of $x\approx 0.7$. As an additional result, it was possible to reconcile the absolute magnitudes of the two WN7-type members using the $R-$values valid in the regions where they are located.
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