1. If you post scans of the older pages for US, UK, Australia, Canada, France, and, maybe, Germany. Other members can tell you about the general appearance of the stamps and whether there are any key stamps. The countries I mention are those where, normally, people with sufficient knowledge are active here.
2. See if there is a local stamp club where you can show the album and members can give you an impression.
3. If you want to sell it, look for a reputable auction house nearby and consider asking for an appraisal. It would not hurt to look for a second opinion.
If you want to keep it and get an impression of the value: look for a worldwide catalogue in the library or buy an older edition cheap on e.g. eBay
. Considering the album Scott may be the one you are looking for. Otherwise, there is the website Stampworld.com.
For catalogue values, consider they are retail values and for almost perfect examples. Most stamps will make a fraction of that value if you sell.
Be realistic about condition and appearance. Many people see an old stamp catalogued at 100s of dollars, pounds, or euros but have a damage, smudged stamp with a terrible cancellation mark. Such space fillers may be worth less than 1% of catalogue value. Ignore cheap stamps. Nice for completion, but they are not adding monetary value to a collection. They do bring a lot of enjoyment.