I have been preparing a 'hotlist' of visually observable (designated)
eclipsing variables with unknown periods
The following eclipsing variables (with minima >12 and
amplitude >.5 and positive declination) still need a period determination:

V374 And
V413 And
V1436 Aql
CK Aur
V355 Aur
V437 Aur
CP Cam
DP Cam
V645 Cas
V1582 Cyg
V2197 Cyg
V2247 Cyg
VX Dra: this puzzle has now been solved, see my article
V367 Gem
V501 Her
V840 Her
WW Lyn: this period is known, see my comments
V499 Mon
V983 Oph chart
V2291 Oph
V1027 Ori chart
NO Per