Having worked in recap shops I can honestly say wood would not do as curing molds for tires. The temperature and pressure such molds are under would lead to quick failure of wooden pieces like shown in the pictures above. On top of that wood is a poor conductor of heat which is necessary to vulcanize rubber.
What your molds made is always a question when old wood positives are found. But definitely not tires. If you search google for old wood sand cast molds you'll see the myriad of orphan designs out there that we may never know what they made.
