Horological Meandering

I'm lucky ... or not. Longines question inside

 

Team,

Few weeks back, I did a trade and since the watch that I was trading had a higher value than the one that I was taking the seller offered a Longines in order to make our deal even.

I took the watch assuming that it was recent, based on the overall looks, and I was expecting an ETA movement inside.

I sent the Longines to my watchmaker for a cleaning and buffing of some minor scratches and I forgot about it.

Time passes and my watchmaker called and made a comment about the Longines movement.

- "It's a twin barrel power train ...".

A quick Google visit shows that this movement was the last one made "in house" by Longines, the 990.

Here is the watch:
 

A very nice size and the winding crown works so smoothly that shows the intrinsic qualities of the movement.

It's a Lindbergh "hour angle".

It's a beautiful watch, IMHO

Outside of the case back, it carries the Longines classic logo

On the inside, hunter case?, it shows the designer of the Hour Angle

Here is where the problems started. Notice the movement number: L994.1. Some info that I got shows this as a manual wind movement.

My question is if this watch is correct or I just got a frankenwatch?

Thanks for seeing.

Cheers,

Nilo