Here are six light gray porcelain uniparts as follows:

Signal with nice drippy glaze, VNM

tough Ohio Brass (RE) beehive style, VNM

Tall mottled blue-gray signal, VNM

Unusual Ohio Brass (RE) cable top - flat chip under wire groove

Nice unmarked signal (probably Thomas) - cool starburst pattern on dome, flat base chip

Nice Ohio Brass (RE) power style - interestingly has a radio treated pin hole! VNM

All are $6 each plus postage -- or take all six for $30 postpaid in the US (about $3 each before postage!)