I've had enough vintage engines in the past to have noticed the color difference, it is very slight.  The original is a little offwhite, this one tends to be a little "off tan"  Not quite tan, not quite offwhite but not "yellowed" by sundamage like some are.  It came in a modern gi joe parts lot with no vintage stuff.  
If you have any questions feel free to ask.  

Item is in used shape, unbroken, has playwear, paint wear. See photos.  Only what you see here is included.  No  other accessories.

***US Postal issues, lack of employees and resources is causing a huge delay at times shipping scanning shipped items and sending items quickly through the postal system. They seem to NOT scan in items for several days upon drop off.   There seems to be no rhyme or reason for the delays, please have patience and if you require a faster service, consider this and chose another shipping option.  

I combine shipping on orders. It is based on weight and not total items purchased.  Purchase what you want and I will refund the excess shipping costs (on combined orders).

I ship items two to three times a week.  I try to have it in the mail within 2 business days. I have a full time job so this is just a side thing.

Thanks for understanding.