Xie -- No, I don't think so. There are several differences:
1)The EV has a horn near the top; the mystery speaker has a rectangular opening near the bottom.
2)The grillcloth is different, of course. Although grillcloths sometimes get changed over the years, the cloth on the EV appears to be original, as you can see by comparing to this catalog page.
3)Looking at the photo Shadorne linked to, it appears likely that the mystery speaker is rectangular as viewed from the top, while the EV is shaped for corner placement.
4)As Theo pointed out, the mystery speaker has something behind the grill near the upper right corner, while the EV does not.
Regards,
-- Al
1)The EV has a horn near the top; the mystery speaker has a rectangular opening near the bottom.
2)The grillcloth is different, of course. Although grillcloths sometimes get changed over the years, the cloth on the EV appears to be original, as you can see by comparing to this catalog page.
3)Looking at the photo Shadorne linked to, it appears likely that the mystery speaker is rectangular as viewed from the top, while the EV is shaped for corner placement.
4)As Theo pointed out, the mystery speaker has something behind the grill near the upper right corner, while the EV does not.
Regards,
-- Al