French Equitorial Africa Cover - Value Assessment

I recently purchased this cover in the Netherlands for 25 pounds. The Scott's classic catalogue appears to value this cover for a few hundred dollars. It makes me question its authenticity. Thought I'd check with the forum/experts.

Suku,
I know nothing about this area, but a gentle hint to help those who know help you the best, please provide as much information as you know to eliminate squinting at your image, specifically:
1. Date and place of origin postmark
2. Destination.
3. Do you know the rate this was to pay? (philatelic mail vs commercial mail makes a difference, and exact/proper rates are important too.)
4. What Scott numbers are these? (it initially looked like 40, 41, 53, and 126 to me, but then I see the overprints on the basic stamps - thus the *importance* of telling us exactly what you see.)
5. Are any of the stamps damaged?
6. Any markings or return address on the reverse side?
7.Since value depends so much upon condition, a full scan of the front and back sides is desirable - a scan which extends beyond the edges by a quarter of an inch since edges and corners are important. The image provided is overlapped on the left side and reduced(?) on the right side.

Bottom line, the more you tell and show us, the more we can tell you in return.

My Classic is a few years old, and they say $130 there, for the 25c usage. It's pretty obviously philatelic and posted late for those issues but not terribly late. There was a whole new set issued between these and the post date, which also argues for philatelic use. I don't know what Scott is using for criteria, they may include philatelic uses in their price, or may only choose regular postal use...

This is so helpful, John. Thank you. I'm very new to collecting.
The cover is postmarked March 26, 1942. I can't make out the origin, but there is a back-stamp noting Brazzaville RPO Congo (is that railway transport?). The RPO is dated April 17, 1942. There are no arrival markings for England. But there is an 'open by examiner 4884' which I assume is British censor tape. There is also French censor tape. So double censored.
Another interesting bit is the destination address. It reads Mrs. Hale, Conservative Central Office, 68 Palace Chambers, Bridge Thick (not sure), London. So was perhaps a French citizen writing to the British Conservative Party during the war.
The stamps are all over prints. As far as I can make out they include Scott Specialized Catalogue Numbers for French Equatorial Africa as follows: 87, 88, 103 and 126. The Scott #103 is damaged. And there is censor tape covering the perforations of two of the Scott #87.
I'm unsure of the rate during this time period so I can't tell whether this is commercial or philatelic.
The overall condition of the cover I would grade as G. There are no creases, there stamps are all well centered. In fact, the Scott #87 is a block of 4 intact. Corners are okay with some rounding edges, but the censor tape kept the envelope in good shape.

Suku,
Valuing postal history is an art and Scott is only a general guide as each feature you describe adds or subtracts to the monetary and postal history research value (non monetary). Thus the impotrtance of seeing the entirety of both sides. It may amaze you what the readers can tell you about your cover when they can see it all.

Thanks again, John...
Here are snaps of the front and back.
This is not my collecting area, and so any feedback on authenticity and +/- attributes that go into valuation of this particular cover would be appreciated.

Bridge Thick? Bridge Street.

https://www.londonpicturearchive.or...726290683922

The cover is genuine; .British & French censor tapes is always a +.
Delcampe item in auction:
https://www.delcampe.net/fr/collect...1177640.html

From the handwriting, I'd guess that the sender was English.

Shouldn't the stamps pay a higher rate in March 1942?

The letter was not sent by air-mail.
Surface mail international from the feb. 1 1940 tariff rate was 2F50 for 20g..

Ah, I thought the tariff had changed in early-1942.

The tariff changed in dec. 1942. For instance,for 20g surface mail it was 4F. registered + 4F

Thank you to all who responded. I'm learning so much from the members on this site.