Not bad at all, i like it.

I took the liberty of index-ing it and correct a couple details.

I don't know if the 2 white dots at the base are supposed to represent something, so i left them.
(Generally speaking, there are a couple things i don't understand, but i tried to preserve the original drawing.)

Also, i think the central beam should be horizontal, but i preserved the orientation in the original drawing.

Indexing an image in the past was essential to save space on hard disk, but there are good reasons to do that, one of them is to simplify palette swapping, as seen in the second picture.

Also, since the color count was 12, i added 4 arbitrary colors (or super-colors) and i drew a version with legal notices and invoices on it, and on the label.
If the palette gets modified and those 2 super-colors have... uh, i ran out of english, i'll include a drawing explaining one more thing about palette swapping.

Keep up the good job.