MTFCA Forum

I saw this at Hershey. I've never seen one like it before.
What year is this for?

'09 - '10 - maybe into '11.

If your building a very early T and need the correct transmission cover the price would be whatever your willing to pay for it. They aren’t common.

depends on the width of hogshead. 9-10 were one inch narrower than the last 10-early 11. the narrow ones seem to be more plentiful
than the wide ones, although still quite scarce.

Compare the width with a common later hogshead. If the early one is that one inch narrower around the flywheel area, it is '09 into late '10. If the early one is the same as the later one, it is later '10 into early '11. The engine pan/lower crankcase also is narrower on the earliest cars.
There are good reasons why the narrower early hogsheads seem more common. The big one is that there aren't very many surviving early inch narrower pans to put the earlier inch narrower hogsheads on. The wider closed pans have been replicated by altering '12 through '15 pans (several people have done some really fine work making them look very good). So pans for the later early hogsheads are more available, leaving the more rare earliest hogsheads begging just a bit.

It should also be remembered that some years back, quite a few of the '10 to '11 wider early hogsheads were reproduced. Even the reproductions have become quite valuable. But a solid good original should be worth considerably more than a repro.

Just for clarification, I looked into B'sbbb (Bruce's big black book). Near the bottom of page 44, Bruce states "A sixth type (hogshead) appeared in late 1910. This cover was about an inch wider to match the "1911" transmission and crankcase, which were needed to accommodate the larger magneto."
I found a couple mentions of the more common later tapered cover hogshead being introduced during 1911, however, reading in dim light, I did not find anything that pinned down just when in 1911. A featured very original August 1911 touring car had the later hogshead on it.