Hi can anyone please ID this lamp?

[Emil D. Nguyen]

Saw it in a local craigslist ad. Looked cool. Thanks! 

[Emil D. Nguyen]

Here is the lamp I picked up today, weird the cap doesn't come off.

[Keith]

Lava lamps all had screw on caps until the early to mid 90's.  

[Emil D. Nguyen]

Thanks guys. This is a picture after 7 hours running. So this is not a midnight? The person I bought it from mentioned she bought it 20 years ago. 

[Emil D. Nguyen]

How could you tell what model it was ;p

[VOXul]

Very nice Starship, especially for $15! The condition of the base looks to be top notch.

[Emil D. Nguyen]

Thanks, it's my first lava lamp! 

VOXul said:

Very nice Starship, especially for $15! The condition of the base looks to be top notch.

[Keith]

Just for future reference, Centurys on the left and Aristocrats on the right.  These are after the change from screw tops;

[Emil D. Nguyen]

Thanks, judging from the length of the base, isn't mind an Aristocrat?

[Keith]

I can't tell from the first set of pics you posted, and the page isn't loading the other pic (at 7 hours) for me.

Emil D. Nguyen said:

Thanks, judging from the length of the base, isn't mind an Aristocrat?

[Emil D. Nguyen]

Please let me know if this one loads. Warming it up :)

[Keith]

Yep, it loaded.  Midnight Aristocrat.  I love the color!

[Emil D. Nguyen]

Aww from what I gathered Century more rare :(