Thank you, Chuck, and thanks to each of you for joining us. As indicated in our press release, revenues for the fourth quarter were $5.4 million, with an operating profit of $369,000. This compares with revenues of $6.1 million and an operating profit of $209,000 for the same quarter a year ago.
For the 12 months ended December 28, 2019, our fiscal 2019 revenues were $21.5 million with an operating loss of $597,000. This compares with the 12 -- the -- our fiscal 2018 revenues were $21.6 million with an operating loss of $901,000.
Looking at 2019 as a whole, our revenues were essentially flat compared to the previous year, but the operating loss narrowed. Although revenues in the fourth quarter were down compared to the same period a year ago, very importantly, they were up significantly compared to the third quarter of 2019.
In the press release we issued in our third quarter -- with our third quarter results, we mentioned several achievements and developments and indicated that we expect that these would have a positive impact going forward. We're beginning to see those benefits -- I should say, we began to saw -- to see some of those benefits in the fourth quarter results, and that we expect these benefits will increase in the next few quarters.
Let me highlight 4 items. The first is contracts with our 3 largest customers. In Q3 2019, we entered into contracts with our 3 largest customers. And in each case, the contracts included higher prices and higher volumes. Due simply to the time needed for scale up, the size of the existing backlog at the time the contracts were signed, the level of customer held inventory, et cetera, the improved pricing and increased volumes are being realized or come into effect over a 3-quarter period, beginning with the fourth quarter of 2019 and extending through the first 2 quarters of this year. And this is what I mean when I refer to the benefits from these contracts will be -- we expect they'll be increasing in this quarter and the second quarter compared to the fourth quarter.
One of these contracts with our top 3 customers is a 1-year contract, and 2 of them are 2-year contracts. The second item I want to mention and highlight is product mix improvements. We are a custom manufacturer. Over the course of the year, we ship tens and tens of different products to approximately 80 customers. We are actively adjusting our product mix to focus on those products, where our material itself, aluminum, silicon carbide and/or the way we do business, our responsiveness, our technical support, our on-time delivery, generate significant value, focusing on those applications where the material properties or our responsiveness, support and delivery generate significant value, and we're adjusting our prices to capture more of that value.
In short, our margins are improving. We're a declining business where the margins are below an acceptable level, and we're seeing meaningful improvement. This is an ongoing process because the full value of what we bring may not be fully knowable initially. And on the other side of the coin, with each new custom part, initial cost estimation may not be perfect, but we're actually getting better at both of these important skills. But the product mix is being managed with the effect of improving margins.
Third item is ongoing success in penetrating the U.S. aerospace and defense electronics markets. Our sales and marketing team is performing well in achieving new design wins and new bookings in the U.S. aerospace and defense electronics sectors. Although the lead times are long in this area, we are seeing what I call a virtuous upward cycle. As one engineering group after another in some of the large aerospace and defense OEMs becomes familiar with AlSiC as a material, the number of potential opportunities where it can be used is -- the number of opportunities where it could be used are being identified in greater numbers.
And just lastly, more purely on the financial side, our new line of credit of 2.5 -- with a cap of $2.5 million has allowed us to stop providing discounts for early payment of our invoices. This has been particularly an issue in Europe and Asia, where payment terms tend to be much longer than the U.S. We have for a number of years been providing discounts for early payment. But by financing that extended payment terms, so to speak, the added revenue resulting from discontinuing a discount flows right to the top line and the bottom line, offset partially by the increased interest expense. But in total, very much a material benefit on both the top and bottom line.
We're -- let me simply say for our largest European customers, the -- we're now using that credit line for that purpose and beginning to realize the benefits from that.
Let me turn the time back to Chuck for a more thorough review of our financial performance.