I have a group of 1 x 4 x 2 fences (Lego part 3633) in black, light bluish gray, and yellow.
However only a few of them say "Lego" on the bottom. These have hollow bottom pins (see picture below, right side). The others do not say Lego or have a part number. They have solid bottom pins (see picture below, left side).
Normally I can feel the difference between Lego and non-Lego parts. But the parts with the solid pins have a Lego feel. Also the yellow ones are the same shade of yellow as my Legos and not the shade of MegaBloks I have.
Is it possible these solid pin fences are really Lego? Or have I been fooled?