Nice-looking pins that are still fairly common. For some reason, I have never seen a 15 year Lockheed service pin of any style.
The 5 and 10 year pins of this style can vary in size by several millimeters.
5 years. More common variation without a stone.
5 years. With one white stone.
10 years.
25 years.
1 year. Quite scarce for some reason.
5 years.
10 years. Not obvious, but this pin has one white stone.
20 years.
25 years. Five white stones.
30 years. Five white stones, one red. White gold.
While I think we can guess what the unpictured year pins might look like, I remember seeing a high-year pin on eBay shortly after the merger. It did not show the number of years as above, was in white gold, and had an asymetrical "crest" of 5 or 6 diamonds at the top left of the pin.
5 year pin with original certificate, dated 1956. The signature is hand signed.
Overseas service pins.
Lockheed Martin 25 year pin in presentation box, and in outer box.